Avoid "analysis paralysis." If you have three good moves that all look roughly equal, pick one and save your time for the critical complications later.
Strategic play doesn't end when the Queens leave the board; it intensifies. Many tournament games are decided in the "technical" phase of the endgame.
Identify "holes" (squares that can no longer be defended by pawns). These are the perfect outposts for your Knights. 3. The Art of the Exchange
If your Bishop is blocked by your own pawns, try to trade it for an active enemy Bishop.
Mastering the Long Game: Chess Strategy for the Tournament Player