Hey Friend!
I think everyone already said all that I could say, but I use the ice cube trays. Once they are frozen, I pop them out into Ziploc freezer bags. Then when you need them, you can grab 1, 2 or however many and heat them up. In a freezer bag, they will keep in the freezer for a really long time - easily a year if not more. In the refrigerator, you can leave your food for 4 to 5 days after fully thawed. Even then it probably will not be "bad," but it will have grown more bacteria by that point. The ice cube trays are cheap and easy, but there are definitely cute and fun containers for sale from people targeting the market of people making homemade baby food. Williams Sonoma has some, One Step Ahead, and Babies R Us. I am sure there are lots more too!
I used the book Super Baby Food for a schedule of when to introduce what foods as well as how to prepare them. I know some ladies have already listed great online resources too. One big recommendation I have: make sure you have a full size food processor for pureeing your food. With my 1st I had a mini sized one, and I would have to puree stuff in usually 4 batches, which just made the process longer and wasted more of my time. If you only have to puree one, big batch and then pour into several ice cube trays (or containers) it is MUCH faster!
I am about to have to re-tackle this again as sweet, little number 2 is about ready to start solids!
Love,
Lisa :)