well done on getting to day 16 - an achievement in itself!!!
you're probably right - nothing worse than being stuck in on a sat night and you cant even have nibbles and wine to munch while you're watching x-factor/strictly!!!
I find it helps if I have my shake, then have a bubble bath, get into my pj's and curl up on the sofa. Just what I've done this evening....oh and keep sipping the water, that helps immensely.
Good luck - stick with it, you can do it!! x