When I stay in hotels I live on tossed salads with mayo for dressing and broiled chicken or steak. Breakfast is always an omlet...or bacon and eggs. If I'm real hungry for breakfast I ask for a HUGE omlet with a side of sausage or bacon.
Always ask what the veggie is..no sense having a heapful of corn or carrots on your plate...ask, ask, ask.

I find that if I eat enough for my meals I usually don't snack much. If you DO like to snack...pick your favs and throw them in a cooler (ice in the hotel is always free).
I watch for sauces. I order everything broiled, no sauce. I ask them to hold the bread or buns (less tempting).

Good luck...and have a great time.

cin