Just put them in a tight container and put them in the freezer. Use them as you like - in salads, candy, cookies, snack mixes, popcorm balls, make your own peanut butter (I don't have a recipe but I'm sure you can find one), put them out for Christmas to snack on, take them to parties, or work, etc.
I would probably keep them for a year in the freezer as long as they are air-tight.
Linda