I think I posted my salmon recipe somewhere here. By far my fav grilling recipe. I let Mike do all the grilling.
As for hamburgers....I usually use egg to bind them...sometimes I'll just use Montreal steak spice for seasoning. I will sometimes grate some onion and use Worcestershire sauce. Sometimes I grate cheese for in the burger (rather than a typical 'cheeseburger'). Or if you wanted to be fancy you could put a cheese 'pocket' in the patty. You could also crumble some bacon in the ground beef.
Second to plank salmon, beer can chicken is AMAZING. Take a beer (whatever you drink), crack it open, take a few swigs (about a third), and stick it up the chicken's butt. You can tripod the chicken on the beer can, or get a (cheap) fancy contraption to hold it all upright. It's been awhile but I think I normally use a can opener to open the whole top of the beer. You can add seasoning into the beer too (rosemary, thyme, garlic, s&p) and season the chicken....cook it over indirect heat until the juices run clear. SO moist and yummy.
I love corn on the grill...and asparagus, carrots, potato...when we grill we cook it all.