Sometimes you only need a little bit of tomato paste, and the rest of the can spoils before you get a chance to use it. The pre-packaged 1-2 Tbsp. pouches are costly. Here is how to use it all:
Before you use tomato paste in a recipe, open BOTH ends of the can, wrap in plastic wrap, and freeze. After frozen, push the paste out of one open end and slice off what you need.
When you only need a partial can of tomato paste for a recipe, measure the unused portion by the tablespoon, place it in an ice cube tray and freeze.