I've just brought on another developer, Luke Hatfield, to help with some of my projects. My thinking was that we'd start small, I'd teach him my processes, and then we'd take bigger bites.
The project I chose to start with turned out totally different than I expected. The client asked for some pretty difficult customizations to his Shopify store. So I worked up a proof of concept (more for me), and then asked Luke to integrate that code into a development site for the client.
Luke found a few false assumptions in my code, and we spent the better part of a day chasing them down. That is until Luke re-imagined the entire thing. Our solution is now simpler, more accurate, more intuitive for the client and their customers, and makes any future updates that much easier.
I was looking for someone to help me code more; I didn't realize he would also help me code better.