Jams and jellies and pickles... anything with a fairly high acid content don't require pressure canning. Just set them in water (water about an inch over top of jars) on some kind of rack (I just used the rings from some other jars). Only loosely tighten the rings. Bring to a low boil for about 15 minutes. Take them out and let them cool. After a few minutes you should hear the lids pop. That's your vacuum seal forming. Tighten rings and voila!
ETA: most recipes will tell you the recommended amount, but leave some space in the jar. Don't fill all of the way to the top of the jar with your jam or brine.
Thanks for the info!!