I'm in the middle of canning a few times a week - stock, pickles, etc. Peaches will be coming up this weekend, and then there are the plums and apples from the neighbor's yard that I need to get working on...
When all is said and done, I don't have time to use all the gleaned blackberries to make blackberry syrup or jam just yet. So, I freeze those berries to do something with later. You know, when I have more "free" time. If you've ever frozen berries, you know if done incorrectly, you'll get a giant berry clump that is hard to thaw. You end up having to use the entire clump, even if you only need a handful for something. My method works great, takes little time, and keeps your bag o'berries from turning in to a berry brick.
1) Rinse your berries, and pick out any leaves that you may find.
2) Put a piece of parchment paper on a large baking sheet, and spread the berries out, trying to make sure they're not all clumped up.
4) Once frozen, transfer the berries to a freezer-proof Ziploc bag.