I had a good stretch of 16 days of working on my last chapter every day. Then one day that I couldn't. Then yesterday, and today, when I started again and was better than ever.
The stupidest trick I know is to write every day in a Seinfeld chain. Just see how many days you can do it. Even two days in a row is a chain. It is stupid because it is easy to do an to understand. It's not some complex idea that needs to be planned. All you need is a calendar and a pen. If you skip a day, then you start a new chain. Pretty soon, there's no stopping you.