Mi nueva estrategia es estudiar a la misma hora cada día y tener un horario fijo para dormir.

In Spanish, when you define a plan, goal, habit, or strategy, it’s very common to use the infinitive after ser:

• Mi nueva estrategia es estudiar…
  = My new strategy is to study…

The infinitive here acts like a noun (similar to “to study” or “studying” in English).

Using a conjugated verb like es estudio would be ungrammatical.
If you said Mi nueva estrategia es que estudio…, it would be understandable but sounds clumsy and unnatural here. The clean, idiomatic way is:

• Mi nueva estrategia es + infinitive
  
  • …es estudiar…
  • …es comer mejor…
  • …es hacer más ejercicio…

For clock time, Spanish almost always uses a:

• a las 8 – at 8 o’clock
• a la una – at 1 o’clock
• a la misma hora – at the same time

En la misma hora would mean something like within the same hour (a span of 60 minutes), not at the same time of day.

So:

• Estudio a la misma hora cada día.
  = I study at the same time every day.

Using a here is the standard preposition for specific times of day.

Adjectives in Spanish must agree in gender and number with the noun:

• hora is feminine singular → la hora
• So mismo must also be feminine singular → misma

Examples:

• el mismo libro (masc. sing.)
• la misma hora (fem. sing.)
• los mismos libros (masc. plural)
• las mismas horas (fem. plural)

So mismo hora is incorrect because mismo (masculine) doesn’t match hora (feminine).

Again, it’s agreement of gender and number:

• estrategia is feminine singular → la estrategia
• So the adjective has to be feminine singular: nueva

Mi doesn’t change with gender (only with number), but nuevo/nueva does:

• mi nueva estrategia – my new strategy
• mi nuevo plan – my new plan
• mis nuevas estrategias – my new strategies

So mi nuevo estrategia is ungrammatical because nuevo (masc.) doesn’t agree with estrategia (fem.).

Both are correct and very common. The difference is mostly style, not meaning:

• cada día – literally each day
• todos los días – literally every day

In most contexts, they are interchangeable:

• Estudio cada día.
• Estudio todos los días.

Both mean I study every day.

In this sentence, cada día may sound slightly more methodical or regular, which fits with the idea of a “strategy,” but it’s a subtle nuance. You could say:

• …estudiar a la misma hora todos los días… and it would still be natural.

Here, para expresses purpose or use:

• un horario fijo para dormir
  = a fixed schedule for sleeping (a schedule for the purpose of sleeping)

De is more about possession, type, or origin, and would sound odd here if you used de alone:

• un horario de dormir could be understood, but it’s not the natural way to say sleep schedule in this context.

The most idiomatic phrasing is:

• tener un horario fijo para dormir
  = to have a regular/fixed sleep schedule

They refer to different things:

• hora = a specific time on the clock

  • a la misma hora – at the same time (e.g., always at 8:00)

• horario = a schedule or timetable

  • un horario fijo para dormir – a fixed/regular sleeping schedule
    (for example, always going to bed at 11:00 and waking up at 7:00)

So the idea is:

1. Study at the same time every day → a la misma hora
2. Have a fixed schedule for sleeping → un horario fijo para dormir

Most descriptive adjectives in Spanish naturally go after the noun:

• un horario fijo – a fixed schedule
• una casa grande – a big house
• un libro interesante – an interesting book

You generally cannot say un fijo horario; that sounds wrong.

Some adjectives often go before the noun (like buen, mal, gran, nuevo in some meanings), but fijo as “fixed/regular” is placed after the noun:

• un ingreso fijo – a fixed income
• un precio fijo – a fixed price
• un horario fijo – a fixed schedule

Spanish doesn’t use the gerund (-ando / -iendo) the same way English uses -ing.

Here we want to express purpose: a schedule for sleeping. For that, Spanish normally uses:

• para + infinitive

So:

• un horario fijo para dormir – a fixed schedule for sleeping

Using the gerund durmiendo here would be ungrammatical:

• ❌ un horario fijo durmiendo – incorrect

The gerund is usually for actions in progress:

• Estoy durmiendo. – I am sleeping.
• Sigo estudiando. – I keep studying.

Not for stating the purpose of a noun.

You could grammatically say el estudiar, but here it sounds too formal, heavy, or old-fashioned in everyday speech.

In general Spanish prefers the plain infinitive without the article in this type of structure:

• Mi nueva estrategia es estudiar más.
• Mi objetivo es ahorrar dinero.
• Mi plan es viajar el próximo año.

Using el + infinitivo often sounds:

• more abstract or theoretical, or
• like legal/academic language, or
• stylistically marked.

So for natural, conversational Spanish, Mi nueva estrategia es estudiar… is the best choice.

Yes. Both orders are correct and natural:

• estudiar a la misma hora cada día
• estudiar cada día a la misma hora

Spanish is fairly flexible with expressions of time.

The chosen order just slightly changes rhythm, not meaning. You’ll often see:

• Estudio cada día a la misma hora.
• Estudio a la misma hora todos los días.

All of these sound normal to native speakers.

The sentence has two infinitives linked by y that both depend on es:

• Mi nueva estrategia es [estudiar…] y [tener un horario fijo…].

So the structure is:

• Mi nueva estrategia es X y Y.

There is no need for a pronoun like la here, because both estudiar and tener un horario fijo para dormir are parts of the definition of “mi nueva estrategia.”

If you said …es estudiar a la misma hora cada día y tenerla fija para dormir, that would change the meaning and become confusing (what does la refer to exactly?). The original is clearer and more natural.

Both patterns exist, but they’re used a bit differently:

1. Mi nueva estrategia es estudiar a la misma hora…

   • Focus: What is my new strategy?
   • Answer: To study at the same time every day and to have a fixed sleep schedule.

2. Mi nueva estrategia para estudiar es…

   • Focus: A strategy *for studying specifically.*
   • You’d expect something like:
     
     • Mi nueva estrategia para estudiar es usar tarjetas.

In your sentence, the strategy covers study habits and sleep habits, so it’s not just a strategy for studying, it’s a broader “life strategy” for productivity. That’s why the simple es + infinitive(s) structure works better.