- You didn’t name a game.
- You didn’t specify a character.
- Because of the first 2, the only advice we can give is to get match up experience with the character.
AE and Boxer
I think it’s possible to say a little more than “get match up experience with the character” - play some matches, learn your normals and specials, figure out which ones you’re getting lots of hits with, and learn combos that start with those first, then go back and learn other combos.