The last time I went over was during my last race (30th March) and also a week earlier during the previous race.
I don't enjoy going over but I think it's best to get them over and done with early in the season. The first one was on a 1 sail fetch and I just got hit by a gust and couldn't bear away quick enough and had to jump off the trap aiming just behind the mains leech. It took less than 4 mins to get righted again. The second was just after a gybe, one hand on the tiller one hand sorting out the trap hook, main was cleated and a piddling little gust just heeled me enough to send me slipping down the tramp un-cleating the main as I passed by. This time I was up really quick as I managed to swing around the rear beam before hitting the water, less than 2 mins probably.
Still practice makes perfect <img src="http://www.catsailor.com/forums/images/graemlins/shocked.gif" alt="" />