I buy the 5lb bags of Plowboy's Yard Bird. I have a large shaker I fill and vacuum seal the rest in a large mason jar and keep it in the pantry until I need to refill the shaker again. I use it on poultry and pork.
For beef I just use Montreal Steak Seasoning and get it in big shakers at Costco. I think the savings on that seasoning compared to the cost at the grocery store pays for my annual Costco membership alone.