Gambits are often a good way to get your opponent out of their comfort zone. As white, some good gambits include:
- the Morra Gambit
- the Evan'sEvans Gambit
- 4.Ng5
4. Ng5
in the Two Knight's Defense (black is sacrificing a pawn here though!)
For black, the Sicilian and the King's Indian are good ways to create a double edged game. A line that you know by heart in the Sicilian is probably your best bet. Against d4d4
you can consider playing an early c5...c5
with the Benko Gambit or the Benoni - both of which can lead to an unbalanced game as well. White probably has a fairly good idea of what to do against the KID because it is so common which is why either the Benko or the Benoni can be a nice change of pace.