I eat normally during the day but steer clear of salad as it apparently holds a lot of water and i think it bloats me, so stay away on WI day!
I also drink loads of water up until about 5pm, so by the time i get to WI at 7pm, it's out of my system! I have been known to lose my place in the WI queue so i can have one last pee! (TMI, I know!)
I try not to snack a lot on WI days as well, so i can have a really big meal with two HExs and all my syns after my WI! Used to have a takeaway after WI but think it started to affect my losses so instead make a slightly naughty dinner that's well within my syns instead!xxx