I tend to either not make any agreements, and simply stonewall if badgered about one until I feel I can make an agreement I'd actually keep, or make one that I more or less intend to keep until the implied expiration point at the endgame.
Of course, I have no illusions that my opponent will do the same. An ancient Arab proverb states, "Trust in Allah, but tie your camel."
To this end I tend not to agree to anything more binding than a border agreement, and then spend the rest of the game watching that border like a hawk, just waiting for the first sign of trouble. But I always let him make the first move, and make sure that this move will be a mistake.
After that, we move to the next phase of relations, otherwise known as "Total War To The Death". Forgiveness may be divine, but divinity comes after you WIN the game, not before.
[ June 30, 2004, 01:47: Message edited by: Norfleet ]