I have the same kind of schedule...
1) Try joining
All Things Food and Diet - FatSecret It's completely free and if you have a blackberry, you can update your food intake and exercise on the go... Helps you realize what you are eating. You can also add "friends" like facebook or myspace (for ehhhh, support).
2) I'm on a smoothie diet. I prep a smoothie each night for the morning and stick it in the fridge. Frozen whole fruit (strawberries, blueberries, etc - whatever you like), a little light soy milk, a little bit of 100% fruit juice. Then in the AM, I blend it and I take it with me on the commute. So I essentially eat/drink breakfast while I drive.
3) About an hour or so after you're at work - have a snack. Something like a Fiber One bar.
4) For lunch (around 1100-1200) eat a tuna sandwich, bowl of soup, or something else that is healthy.
5) Afternoon snack about 2 hrs after you eat.
6) For dinner, 2 bowls of salad, with light/healthy dressing. One serving of meat (chicken, pork, etc.) Side of vegtables - like broccoli if you want.
By doing this, I've lost 6 lbs in the past 2 weeks... and I haven't increased my exercise level at all.
Just keep your calories UNDER those that you expend in daily activities. And try to balance your carbs, your protein, and your fat.