I know a lot of hard-core foodies will tell you to throw out your pre-ground spices every 6-months or change them all out with the coming of daily light savings time or something.
Whatever.
I recently took several forgotten about spice racks from 2 family members and consolidated everything from dried marjoram to ground sage into one big container of General Spice Mix #1 Med/Ital/Greekish combination.
No one seemed to complain when I seasoned and then grilled chicken on the BBQ with this concoction.