MY biggest tips would be - do your measurements, it's a boost when you feel that you haven't lost weight or the scales say you haven't and you remeasure to find you have lost inches.
Treat yourself - have little gifts along your journey. My first stone meant I had my eyebrows waxed professionally, 2nd was a manicure, 3rd was 3 new items of clothing and a pair of shoes in one shopping trip etc etc.
Drink! - water water water I carry a small bottle with me everywhere and top it up as I go along through the day.
Find an exercise that you like and think you can stick to - mine is aqua aerobics and I get annoyed if I miss a week.
Don't beat yourself up if you don't lose for a week or two
Oh and save some calories or your treat for the evening when you are sitting in front of the TV.
Feel free to shout if youhave any more ?s