This is a great thing to make with extra fruit in the summer, but also a great treat with frozen fruit in the winter. Simply defrost and follow the directions on the pectin container.
I bought this pectin, which allows you to make 22 half-pint jars total. You can make up to 10 jars per batch:
You can double or triple the recipe, which is nice if you have a lot of fruit. There is also a low-sugar recipe on the pectin. I haven't tried it yet, but it looks interesting.
You can can or freeze the jelly too, but unless I have a bunch of fresh fruit to use up in the summer, I like to just make enough for us to eat right away. I just put the jelly in glass jars.