Even though I used to play a number of years ago I would never have been able to tell you a "Philidor's Position" from a "Lucena" from an "Elbow".
If you don't know what the Philidor's Position is with regards to pawn and rook endgames, then I strongly suggest that you have a read, http://en.wikipedia.org/wiki/Philidor_position
It can help you pull a draw out of the jaws of defeat.
For example Game 3104090
Once you've learned the Philidor's Position, get to grips with the Lucena Position http://en.wikipedia.org/wiki/Lucena_position