I found a useful little program called WorkedGrids.
It is a program that produces a basic map of your zone eg europe with all the IARU grid squares marked.
It marks each square you have worked with a colour box depending on which band you worked that square.
CLICK IMAGE FOR FULLSIZE VIEW
It is fully configurable and works by reading a computer logbook program ( I use WinLOG32 by Colin G0CUZ) adif file. It is ideal for keeping track of what squares you have worked both all time and per year.
Workgrids is written by Bertrand Zauhar VE2ZAZ and is available on Bertrand's website at