I combine sea salt, thyme, cayenne pepper, and fennel which makes my favorite french fry seasoning. It probably sounds like a weird combination, but I can't get enough of the stuff. I add oregano to garlic powder to make my version of Italian bread.
I mix turmeric, fennel seeds, star anise, and Sichuan peppers together for a great stir-fry blend. I mix a tiny amount of garlic powder with dried minced onions, poppy seeds, and sea salt for a blend that enhances the flavor of eggs.
I mix ground garlic, ginger, lemons, and honey, but I am glad to read about the other available options in this thread. The only way to discover something is to try it out, and so I will try using some turmeric next time.
I'm not that great in the kitchen, so you'd better believe that I'm taking notes. I love using spices, but I tend to add too much of them. How do you fix your meal once you've added too much salt or too much pepper?