Make a "Post To Finish" list!
I don't know about you but I got myself a mayor and never ending list of blog post ideas. I keep them in a notebook where I just put down all of my post ideas. So sometimes when I sit down to work on posts I get a little torn of what to choose...So I make a list with at least 4 posts that I want to finish.
Put down that sudden wave of inspiration!
If you get a inspo wave of a post, even if it's just a part of it, write it down asap! Doesn't matter if it's in your usual document of post in progress, your actual blog or your phone. Grab a piece of paper or napkin and just jolt it down for later.
Download Buffer App!
Or the app to the program you are using to schedule your social media (if you're not I highly recommend it!). Because if you have it on your phone you can schedule and such on the go, which can save you a lot of time if you have five minutes of nothing to do. Waiting or riding the bus for example.