1) "Just say no" to trigger foods - for me this means no sweets & breads.
2) Exercise (walk, jog, stairs) at least 150 minutes each week.
3) Track all food & activity on myfitnesspal.
4) Add in natural activity at least two different ways each day: park at farthest parking spot, stand up at my desk most of the day, take the stairs at work to my 4th floor office, walk to a bathroom on another floor at work, walk to mailbox, etc.
5) Don't let one bad decision turn into one bad day or a bad week. I love the idea of 4/5 mentality!