Middlegame goals are to;

1) checkmate the enemy king, 2) win material, and 3) establish a winning endgame.

In the middlegame, active, coordinated pieces, open lines, and aggressive play are the keys to success.

The most important middlegame principle is to establish and maintain a SAFE and ACTIVE position (passive positions contain the germs of defeat).

Don't be afraid to sacrifice to press forward to your main strategic goal. An advantageous position does not win itself against a resourceful opponent, and at some point it may become necessary to "get your hands dirty" and analyze precise tactical variations.

In symmetrical positions, a single tempo can play a decisive role. The first player to undertake aggressive actions can often force his opponent into a permanently passive role.

Always be aware of back-rank mates. If it is possible to make some luft for your king, without serious loss of time or weakening your king's defenses, it is well worth considering.

A fianchettoed bishop combined with a pawn advance on the opposite wing is a standard technique for exerting strategic pressure.

If the position is equal, then playing too hard for the advantage is risky.

No matter what the position or situation on the board, remain calm. Panic routs logical thinking.

Atmosphere

Super Admins