Uncle Tom's All-Purpose Seasoning and Barbecue Rub has been used on a lot more things than I've learned of but a partial list would include:
Grilled corn
Green beans
Grilled asparagus
Avocado
Tossed salad
Popcorn
Beef
Pork
Chicken
Fish (salmon & halibut, shrimp & scallops)
Wings
Eggs (scrambled and/or fried)
Potatoes (baked and French fried)
In short, I suspect you can use it anywhere you'd use salt but want just a subtle twist and a little kick.