Basically you make cleaning a habit and minimize movement. If you were chopping onions, you'd use multiple containers, one for input, one for output. Placement would be so that your hand doesn't have to cross in an inefficient manner.
In software, it's probably things like keyboard shortcuts, and using some tools to store knowledge as opposed to keeping it all in your head. But keep the process clear and clean.
The first thing to do is figuring out the first thing to do and not just doing it - actually do spike docs before (or while) diving in.
Prepare things before you use them - have your onions chopped and ready to toss in when the order comes. Clean up when you're done (close your tabs).
Communicate clearly. Don't wait for the other person to ask questions, give them the info they need to move in one go. Acknowledge when you receive a communication, as soon as possible (especially work remote).