I am lazy, I run my jars and lids through the dishwasher on the very hottest cycle and leave them in there instead of sterilizing. When I didn't have a dishwasher, I used to set them upside-down on a cookie sheet covered with a wet dishtowel in the oven at 300 degrees. It only works for pickles, sauerkraut, peaches and tomatoes though--no good for anything else.
Veggie pickles for pasta salad:
Put in a very clean bowl, sliced veggies of your choice. I use zucchini, carrots, cherry tomatoes, halved artichoke hearts, celery, but you can really put whatever you like. Add 1 can black olives and 1 jar green olives, with their juice. Spoon into very clean jars. Add 1 tsp salt and a good shake of Italian seasoning to each pint jar, then add 1/4 c. red wine vinegar, 1/4 c. cider vinegar and 1/4 c. olive oil to each pint jar. If there's any room left in the jar, top it up with boiling water till the veggies are covered. Seal jars per the instructions on the Mason jar lid box--I usually get a stockpot of water boiling on the stove and put a dishtowel in the bottom of the strainer portion of the stockpot.
1 pint jar veggie pickles + 1 box pasta, cooked + grated Parmesan to taste = easy pasta salad
Canned seasoned tomatoes, to be used in chili or pasta:
Pack lots of tomato slices, fresh basil, and 5 garlic cloves into quart jars. Add 1 tsp. salt and 1 tsp. sugar to each jar. Set the lids on the jars (don't seal them with the rings yet) and put them on a cookie sheet lined with a damp dishtowel. Put the cookie sheet in the oven at 250-275 F. Bake 45 minutes. Carefully remove cookie sheet from oven, and seal the lids (wearing oven mitts!).