We just bought our first "grown-up grill" and I'm not sure how we survived without it.
You can literally grill anything!
**All of your meat sources you can cook on the grill, just make sure you marinade in a sauce that you made, or is free of sugar and other fillers.
**Grilled veggies: Get some kebab skewers, and layer chopped veggies (and maybe a pineapple) on the skewer, and go to town. You can also slice sweet potatoes and grill them as well!
As it is currently summertime, I highly reccomend grilling just about every dinner you have. It is so easy on a sunday to grill your chicken, beef, and pork all in one shot, and that will have you prepared with meals all week.