Don't be a donk

General rule: never re-raise (except on the river). If you believe you have the best hand, and you got raised, call. Re-raising at any time except on the river is a donk bet. Re-raising potentially ruins the possibity of winning more chips in the end. Re-raising with the strongest hand invites the original raiser to fold. And will almost certainly make the rest of players on the table fold. Remember the first principle of poker, it is not how many hands you win but how many chips you get in the hands that you win.

An exception to the rule is when you flopped flush with small hole cards, and you want to end the hand before the turn. Personally, even in this scenario, I do not re-raise.