Dub. I am in a similar place at my work - trying so hard to make a change! I spend so much time at work, it's difficult to have things be so lousy.
to the OP, for me if I don't have a meal, snack, meal, snack, meal then my weight loss STOPS. I don't eat much at a time, but I seem to need to spread it out. Some days it is hard to get everything with my liquids in.
I try to pack up my Snacks, and honestly most of my meals on the weekend so I can just fill my cooler in the morning. for me snacks have been either a power crunch Protein bar (because I love the triple chocolate) a Protein shake, light string cheese with 2 pieces of lunch meat, a small serving of cottage cheese with oh, maybe 3 strawberries, or 1/4 of a banana, or else I will have 1 ounce of almonds and one ounce of dried cherries, or maybe an extra small serving of lima Beans. I don't know how this will change as things move along - I am only almost 3 months since surgery- but this, for now keeps me loosing weight. There's only been 3 different weeks I didn't loose and it was always when I cut out my snacks.
as for beverage I *really* like Vitamin Water zero. the LEMONADE is my favorite! they are sweetened with stevia- Walmart has the best price for the multipacks.
I hope you get some more ideas, because it is all so much easier when things are planned out and you don't have to try to figure food out on the go and stressed. Off to pack my lunch box now!