Learn Spanish (Latin America): No suelo trasnochar porque necesito madrugar mañana. - I don't usually stay up late because I need to wake up early tomorrow.

In Spanish, the verb soler is used to say you 'tend to' do something or are in the habit of doing it. Instead of using an adverb like 'usually', you conjugate soler (here, suelo for 'I') and follow it directly with an action verb in its infinitive form, like trasnochar. Notice that soler is a stem-changing verb, where the o becomes ue.

Are trasnochar and madrugar the only ways to say 'stay up late' and 'wake up early'?

While you could use longer phrases like quedarse despierto hasta tarde (to stay awake late) or despertarse temprano (to wake up early), Spanish has these fantastic single-word verbs specifically for these actions. Trasnochar relates to noche (night), and madrugar relates to madrugada (early morning). Using them makes your Spanish sound much more natural and concise.

Why aren't trasnochar and madrugar conjugated to match 'I'?

In Spanish, when two verbs are paired closely together to form a single idea, only the first one is conjugated. Since suelo and necesito are already conjugated in the 'yo' (I) form, the verbs that follow them must stay in their infinitive (dictionary) forms. That is why we leave trasnochar and madrugar in their base -ar forms.