Custom spice blends

[DCnDC]

My response in the "What are your favorite spices? (http://boards.straightdope.com/sdmb/showthread.php?t=641225)" thread wasOnion powder and cayenne. I use them both in pretty much everything, so I buy a 5 oz. bottle of each and just mix them together.and it made me want to ask what other people make custom spice blends with.

So... what custom spice blends do you make and what do you use them for?

[silenus]

Onion powder, garlic powder and cayenne. That's the base for my Chex Mix recipe, so when I get to making batches of it I just premix the spices in a big jar.

[Paintcharge]

My dry rub for ribs and BBQ is salt, paprika, chilli powder, cumin, cayenne and brown sugar.