I am one who is often hungry and needs a snack every 2.5-3 hours. To make sure I don't eat more often than that by habit, I set an alarm to the next time I can or should eat, and make sure not to eat before the alarm rings. So if I have lunch at noon, I will set the alarm on my phone to ring at 3pm....
Replace the words "I should" and "I will" by "I do" and "I can"! Change "I'll try" to "I'll do it"! Replace "It's hard" by "I can do this"! Have faith in yourself and your abilities, and pretty soon you'll come to realize that you are a lot more capable than you think!!
When I go to work I don't try to park close to the front door, instead I allow myself some walking distance. When I reach the building I take the stairs to the 5th floor instead of the elevator! It takes me almost 10 minutes and I really feel those stairs! This can really be done anywhere, anytime!
I have started writing a monthly progress report. Every first Sunday of the month I measure in and write a blog entry describing my pounds and inches lost, but also my exercise progress, what's new in my program, etc. I find this to be a great motivational and consistency tool!
If you know today is your workout day, don't think about it twice, just get up and DO IT! No excuses, no buts, no later, JUST DO IT, NOW! It will be over before you know it and you will feel so good and proud!!
Instead of thinking about how much weight I have to lose and how much time it will take, I now set only one small, daily goal first thing in the morning. I write it in my journal so I don't forget and make it official, then I only focus on this goal for the day. I set a different one the next day.
I workout 3-4 times per week and hardly ever do the same workout twice in one week. I make sure to add variety to my workouts, try new strength training moves, add jumps to my aerobic exercises, whatever I think of to make it fun. It takes boredom out of the process and keeps it challenging!
Having one small piece of chocolate is fine, having a whole package is not. Going back for seconds is also not a good idea, and often not necessary. Learning to say NO THANKS to second and third portions, or saying NO THANKS when someone brings cake at the office has helped me tremendously!