If you do a search on the flights on continental.com, you'll find that all BOS-IAH flights have "snack" in coach. That's often a sandwich (cold or hot), & a candy. But you'll be fed.

If you're on a 737-300, then no inflight entertainment. If it's a 737-700, you can audio/video with screens dropped from the ceiling. Headphones is $5 (or a CO currency coupon) or bring your own. Make sure you have a 2-prong airline headphone plug (available at Radio Shack for a few bucks).