Here are some alternatives to plastics. I will share more tips as I find them, as it can be pretty overwhelming to try to quit plastic cold turkey.
Garbage bag alternatives: Bio Bags, decomposable and compostable. I buy mine at the local hardware store. They are a little thinner than normal garbage bags so I make sure not to load them up too much.
Laundry detergent: I have switched to powdered detergent that is packaged in cardboard. You can also buy some discs that you stick in you washer that work by changing the particles in the water. I had some at one point, but lost them in a move.
Cleaning supplies: I have stopped buying any supplies that come in plastic bottles. Meyer's has a nice powder scrubber, and the oxygen bleach is a natural alternative to bleach and is not harmful to the environment. You can also buy Bon Ami, which also is a good cleaner and it is much cheaper (the oxygen bleach is apparently what raises the price). Also, I have been experimenting with some homemade cleaners.
Kitchen Soap: The natural living store near my house has dish washing soap you can buy in bulk. They also sell reusable plastic or glass bottles to fill up. I have also switched to bar soap in the shower and at the sinks for hand washing.
Lotion: Like my kitchen soap, I was able to find body lotion that I can buy in bulk and I bought a reusable glass jar. Unfortunately I have not been able to find an alternative for my face lotion.