What do you like to do?

 Most grammar practice is pattern practice. Patterns are things that repeat. If you remember a grammar pattern, you can say hundreds of things correctly.

Today, we practiced

I like food.        vs.      I like to eat.

I like music.    vs.        I like to listen to music.

I like shopping malls.    vs.   I like to go shopping at the mall.

I like soccer vs. I like to play soccer or I like to watch soccer on TV.

What people do you like?

What places do you like?

What do you like to do?