Yeah, "learn to use vim properly" has been on my TODO list for about 15 years now. It's probably time I did something about it.

This Vim game helped me more than anything I'd seen in ~5 years: http://vim-adventures.com

It's pretty outstanding, but I'm kind of baffled by the pricing (6 months for $25). As already a vim expert, I clicked the pay link expecting to happily drop a one-time ~$10 and balked. Just going through the demo is likely to be worthwhile, though.

The pricing's aggressive, but I've been in chump-mode for Vim for way too long. So for me it was like, "okay you've got me, you bastard."

It was worth the money, because even small, lasting productivity improvements are that valuable. There are heaps of other ways to learn vim, but it's been a long time and I haven't done them.

Sure; I'm not convinced it's not worth it for most people! I'm just not sure how able they'll be to convince people of that, and I don't expect it's worth it for me (unfortunately).