God knows I'm no endgame expert, but a few important guidlines are:
In the endgame, your king is a strong piece. Use it!
Usually you want to bring your king to the center
It's not a matter of how many pawns, it's all about queening one!
Keep your rooks active and aggresive, not passively defending
Rooks belong behind pawns, either yours or your opponent's
That I know and I'm not even that great a player.
What seems more interesting is the combos and pattern recognition and when to enter a king-king-pawn combo in the first place to succeed in getting a queen, rather than stalemate or losing the pawn, because it might involve a stalling move at the right time, or something like that.
I'd be interested in knowing tricks that transcend the more obvious things people can easily see and learn from experience, to things discovered through extensive playing and deep analysis, distilled down into rules and patterns that really increase effectiveness.
For the opening and the middle-game I'm aware of principles to follow as basic strategic ideas.
Like trying to control the center, developing the least active pieces to squares where they get the most activity, attacking weaknesses and so on.
But when it comes to a relatively even endgame, I don't really know any strategic ideas other than pushing pawns.
So is anyone aware of endgame principles that are as easy to grasp as the ones for the opening?