Спасибо за совет, я так и сделаю.

Because Russian uses спасибо за + accusative to mean thanks for ....

• спасибо за совет = thanks for the advice
• спасибо за помощь = thanks for the help
• спасибо за письмо = thanks for the letter

So за is the normal preposition here, and совет is in the accusative case. For this noun, the accusative singular looks the same as the nominative singular, so you still see совет.

It is in the accusative singular because it follows за in the expression спасибо за ....

With an inanimate masculine noun like совет, the accusative form is the same as the nominative:

• nominative: совет
• accusative: совет

So the form does not change, even though the case does.

Here так и means something like:

• just like that
• exactly that
• that’s exactly what I’ll do

This is a very common Russian pattern. The particle и does not mean ordinary and here. It adds emphasis.

So:

• я так сделаю = I’ll do it that way
• я так и сделаю = I’ll do exactly that / That’s just what I’ll do

In this sentence, так и shows agreement with the advice and a clear intention to follow it.

Russian и has more than one use. Besides meaning and, it can also act as an emphatic particle.

In так и сделаю, it strengthens the meaning of так:

• так = so / like that
• так и = just so / exactly like that

So this и is not connecting two words or clauses. It is adding emphasis.

Сделаю is the perfective future of сделать. It means I will do it / I’ll get it done.

Russian aspect matters here:

• делать = imperfective, focusing on process or repetition
• сделать = perfective, focusing on completion

Since the speaker means I’ll do that as a completed action in the future, сделаю is the natural choice.

Using делаю would mean I am doing or sometimes a habitual present, so it would not fit this sentence.

Because perfective verbs in Russian do not have a true present tense. Their present-looking forms actually express the future.

So:

• делаю = I am doing / I do from imperfective делать
• сделаю = I will do from perfective сделать

This is a very important Russian pattern:

• imperfective present form = present meaning
• perfective present form = future meaning

Yes, absolutely. That is very natural.

Russian often omits subject pronouns when the meaning is already clear from the verb ending.

• сделаю already means I will do
• so я is optional

Compare:

• Спасибо за совет, так и сделаю. = very natural, perhaps a bit smoother
• Спасибо за совет, я так и сделаю. = also correct; я adds a little emphasis or clarity

Because this sentence contains two clauses:

• Спасибо за совет
• я так и сделаю

The comma separates them naturally, like:

• Thanks for the advice, I’ll do exactly that.

In Russian, commas are often used between clauses even when English might sometimes be more flexible with punctuation.

Because Russian often leaves out objects that are obvious from context.

In English, you might say:

• I’ll do that
• I’ll do it

In Russian, if the listener already knows what is meant, the object can be omitted:

• Я так и сделаю. = literally something like I’ll do so / I’ll do exactly that

The missing object is understood from совет and the situation.

Not exactly.

• Я так и сделаю = That’s exactly what I’ll do
• Я сделаю так = I’ll do it this way / I’ll do it like this

So так и сделаю is the idiomatic response to advice. It points back to what was just suggested.

By contrast, сделаю так often sounds more like explaining a method or manner.

Yes. Спасибо за ваш совет means Thank you for your advice or Thanks for your advice, with your made explicit.

Compare:

• Спасибо за совет = Thanks for the advice
• Спасибо за ваш совет = Thanks for your advice

Adding ваш can sound a little more personal or a little more formal, depending on context.

Yes, usually.

Совет is singular and often refers to:

• one specific suggestion
• a piece of advice
• advice in a concrete instance

Russian often uses a singular countable noun where English may use the uncountable word advice.

So:

• Спасибо за совет = literally Thanks for the suggestion/advice
• very natural English translation: Thanks for the advice

It is fairly neutral and natural. It can work in many situations.

• Спасибо is standard and polite
• за совет is neutral
• я так и сделаю sounds friendly, cooperative, and natural

It can be used with friends, coworkers, teachers, or strangers, depending on tone. If you want to sound a little more formal, you could say:

• Спасибо за совет. Так и поступлю.

That sounds a bit more polished or formal than сделаю.