Here is a list of some things I freeze and how to freeze them.
I wrap individual pieces in plastic wrap or fold over bags and then put those pieces in a large freezer ziplock bag which you can reuse. That way I don't waste expensive freezer bags and each piece can be pulled out and thawed separately. I put a few slices of deli meat in back in its original package if it is resealable.
I put shredded cheese in fold over bags and then put those in a large freezer bag. For presliced cheese I put wax paper between slices so that I can just take one piece out at a time. I put those back into the original bag if it is resealable.
I freeze homemade salsa, salad dressing, etc. in yogurt containers. Then I pop them out and wrap in saran wrap and then put those in a freezer ziplock. Then you can just pull out small amounts when you need it. Or I will freeze large amounts in a recycled sour cream container.
Curry Paste and Canned Chipotle
I puree or chop my canned chipotles before freezing. Measure out tablespoons of curry paste or chipotles onto a big piece of plastic wrap set on a cutting board. Cover them with another piece of plastic wrap and lay it all in the freezer. Cut each tablespoon out and put them into a ziplock bag. Then you can just pull out what you need.
Peppers and Onions
Just chop and freeze in small amounts in fold over bags, and put the fold over bags into a bigger ziplock bag. That way you don't have to burn your cuticles or cry every time you need peppers or onions. They freeze very well. See previous post about this topic.
You usually only need a few green onions in a recipe but when you buy them you gets tons. I chop up the white part and chop up some chives and freeze in yogurt containers or small plastic containers that I got from Aldi. They are a little bigger than an ice cube. I found that an ice cube tray was too small. Put the green onions in your container with just a little bit of water (they will float) and freeze. Then top with more water to completely cover and freeze again. Wrap each frozen aliquot in plastic wrap and store those in a bigger ziplock. Green onions will be a little wilted once thawed but are just fine when put into recipes.
I have frozen leftover whipping cream in a recycled cottage cheese or sour cream container. I just thawed it in the fridge and it whipped up just like it was fresh.
When raspberries or blackberries are on sale I buy a ton but I have to freeze them. Wash berries and lay out in a single layer on a cookie sheet. Freeze and then put into ziplock bags. This way the berries won't stick together and you can easily pull out a few.
Homemade Baby Food
Puree your food and put it into clean recycled glass baby food jars. That way you can just pop out a jar when you need it and pop it in the fridge or microwave to thaw and serve straight from the jar. Texture from thawing won't matter because it will be pureed anyway.