From everything that I have read seeds store best dry, dark, and cool - like so many other of our pantry storage items . I have kept my stash (partially used seed packets, self-saved seeds, and unopened packets of seeds "bought on a whim" but not used before the "whim" wore off ) in ziploc bags, in a plastic box meant for files, in the coolest place that I can find in the house. And have had reasonable luck with germination with most things even after several years. This year I am keeping all my newly bought, and not yet planted, seeds in a glass gallon jar in the extra 'fridge. I don't really know if that will make a difference. One thing I have read about storing seeds this way is to pull the jar out of the 'fridge a day before you need the seeds, to stabilize the temperature, and prevent moisture buildup on the inside of the jar when opened. A seed is a seed is ... not ... a seed; in other words, what works for one doesn't necessarily work for them all. Seeds have different abilities to stay viable. If you want to save seeds it is important to learn how that is best done for the seeds you want to save. Tomato seeds will last quite awhile, in my experience, onion seeds not so long (only a year or so). And if you want to save seeds from your own plants that is another thing altogether. There are several good books on the subject, and I am sure that the internet has even more information. Sorry for the long post, but I get the feeling from reading different posts (not specifically on this forum) that many beginners feel that what works for this will also work for that ... and it ain't necessarily so