Exercise is Key. You have to get some in. Go for a walk, change your printer to a different location in the building.
When eating, think protein first. If you don't get 50g of Protein a day, that can slow your losses.
Drinking plenty of Water - not just sugar free drinks, but Water. - This is how you flush the fat out of your body.
You have to move to lose weight, even if its only for a few minutes at a time. I have to be to work by 7:30, I get up 15 minutes earlier than I used to and take the dog for a walk. Then at night, I pace the kitchen while making dinner, I step up and down my bottom stairs while on the phone, or waiting for laundry to ding. Weekends, my husband knows he's in charge in of Breakfast while I go for my walks or to the gym. You have to be creative, but if it's important to you, you will make it work.