We are usually so busy during the summer now days, that we don't have much time to can vegetables. One quick solution for us is to freeze our tomatoes.
Simply toss your tomatoes (washed and dried) into a walmart type bag and stick in the freezer. When you thaw them out for cooking or canning, the skins will slip right off. We usually save enough for spaghetti sauce. We cook up a nice pot of sauce then save the leftovers in the freezer also.
This trick has been a relief for us. It is hard to can all the vegetables when they become ripe all at once!