Why not “Fetch”?

Both “bring” and “take” have secondary definitions and idiomatic expressions that we won’t get into here. This post is about deciding whether to use “bring” or “take” in their normal usage of transporting something from one place to another.

Here’s the key: “Bring” is from the perspective of the speaker, generally toward the speaker; “take” has to do with the person spoken to.

Bring me the grammar lesson!
I can bring a veggie tray. Can you take a veggie tray to the party too? (If you’re at the party, you could ask them to bring a tray since it’s toward you, the speaker.)
Bring it on!
Take your time.
Take that spider away!

Darren Bell makes the point, but a little less clearly.

I leave the idioms and special usages to you.

PS. “Fetch” replaces both words, but it’s rather informal.