I do basically everything that everyone has listed here. I do have a few other little ideas.

I chop up and freeze onions all the time. That way I always have them on hand. Put in ziploc and sqeeze out all the air. Flatten it out that way when you need them, you can just break off a chunk. I do this with bell peppers too.

Also when putting laundry in the washer, I button up or zip up all my clothes. I figure I am gonna have to do it anyways. So than it saves a second or two when I am folding or hanging clothes up. that is kinda a silly one.

Marinating meats. I have just started to do this one. Take your meat and put in a ziploc bag with the marinade and than freeze. When you take them out to defrost, they will also be marinading.

__________________

Most of the things I do are already listed here. But instead of boiling tea on the stove to make sweet tea, I put the teabags and some water in a microwavable glass and heat it up in there for just a few minutes. Then it's ready to pour in your pitcher and mix w/sugar and water. I also keep a large bowl w/some biz in it and when the baby has a dirty bib or has gotten something on his clothes I drop it in there. No need to pretreat and wait before you do laundry, just throw them in there!

The pre-chopped onions is a great idea. How long do they keep? I've purchased the frozen garlic at Trader Joes, as it is frozen in 1 teaspoon cubes, but I could have been making them myself!

With regard to zipping up stuff . . . my local consignment store gives out a flyer about how to keep kids clothes in good shape so they're more apt to be accepted at the store (they're pretty picky) - and one of their tips is to "zip up anything with a zipper" because when they're left open, in the washer and/or dryer, they rub up against the other clothes and can make the fabrics look worn out faster.

I do that too! That way I don't feel guilty for watching shows like The Bachelor!

__________________
Check out the Mommysavers Fan Page on Facebook
Frugal Tweets! Follow Mommysavers on Twitter
Preorder the NEW Mommysavers.com Book: Instant Bargains