Let's all share some neat cooking tricks and tips with each other! I have a few to get started.

easy way to separate an egg.
all you need are 2 bowls/plates and an empty plastic water bottle.
Step 1. Crack the egg into one of the bowls
Step 2. Squeeze the water bottle and touch the yolk with the bottles top.
Step 3. Unsqueeze the bottle. The yolk will go into the bottle, leaving the white behind.
Step 4. Before the yolk slides out, transfer it into the second bowl. You have now separated an egg. Hooray!

How to make quick blueberry jelly.

Step 1: blend a container of blueberries in a blender. You will probably have to push any bits that go onto the sides back down with a spoon.
Step 2: Transfer the blended blueberries into a container.
That's it. Blueberries have a lot of pectin, so the blended berries will jell on their own.