A lot of folks have mentioned not liking the garter toss so I just wanted to mention what DH and I did for ours because we found it worked quite well.
I wore two garters (that I put on myself) - one to throw and one to keep as a keepsake. When it came close to the time for the garter toss, I stepped to the side of the room out of sight and took the garters off myself so I could hand the one for throwing to my newly-minted DH. We just treated it the same as the bouquet -- it magically appeared in his hand and then it was thrown and that was it.
After each was caught, I took a picture with the lady who caught the bouquet and my DH took a picture with his cousin who had caught the garter. His cousin wore it on his arm the rest of the night - not out of tradition, but because he was 22 and highly intoxicated, thus making everything in the world hilarious to him. (Just to clarify - he was a perfect guest and gentleman... just without proper diction or balance for most of the evening).
The one somewhat non-traditional aspect of the whole thing was that my father was the one who bought the garters from the store. There was no sentimentality to that or anything -- actually, my father would be weirded out if he thought there was. It was just that everything was hectic in the days before the wedding and he overheard me telling my mother that I'd forgotten to get a garter and something blue. So... since my university has blue as one of its colors, he went to the local school branded store and got two that had my school color and logo on them (I didn't even know they made such a thing). I LOVE that my garter had my school logo on it, but at the time, I was honestly just happy I had one fewer errand to run in those last 72 hours.