I get rid, or use up most of them within a year. This is a good time of year to replace them, as all of the stores put seasonings on sale for holiday baking. Just be sure that what you are buying is fresh. I like to buy them in the bulk section because our store replaces them regularly. I save the little bottles that I had from the chain grocery store to store them in. However, I am a little lazy about refilling them and the spices end up in baggies until I get to it.
~ C