I have little labels on each jar of spices that I write the “bought” date on. In general ground spices I’ll give 9 months to a year, herbs I’ll typically give about a year, and whole spices I’ll give two years. As I’m using them, I’ll check the date on the jar to see if I need to add it to my shopping list. Every once in a blue moon when I remember, I’ll also just audit my spice rack.

Anything that you can grind yourself buy whole.

It really doesn't take long to grind a tsp of cumin, and the seeds stay fresh so much longer than the powder. And if the seeds start to lose their punch just toast 'em.

Get a bigger mortar then you think too. You'll read about making pesto, or guac, or lots of Thai dishes, and wonder if it real does taste better. Sadly it does and you'll regret your small mortar every time you make guacamole.