Wow! Thanks for all your replies!
I find that if I get weighed and have put on, I know where and why so I don't feel gutted or anything. Just disappointed with myself as I know it was a lack of will power over the weekend.
When I eventually get to target, I want to stick to the 80/20 diet. Eat good 80% of the time and knowing that if I'm out and eat a Big Mac (nyom!) it's not going to send me on a downward spiral back to junk food and weight gain!
I find I have an issue with that. Instead of eating a chocolate bar, enjoying it and counting it as a one off, I end up eating worse as the day goes on. Feel like I've already ruined the day so why bother being good.
I also feel I need to get out of the 'treat' mentality. I can't be the only one who has a bad day so eats something naughty to cheer myself up. Or have a good day and to celebrate we order a chinese. I need to think of treats that aren't food related!