Using a practice routine is a deliberate habit which you use to ensure that you will make progress every time you sit down at the piano.
The one I have developed here is in 3 steps:
This is about what you need to do to get ready. Even the simple act of getting ready on a consistent basis gets you set up for success.
The steps in getting ready are ridiculously easy, but don't discount them.
First - sit at the piano. It is really difficult to practice the piano if you aren't near one.
Second - get out your music. I suppose, it could be amended to be, get out the music you want to make progress on. I'll confess that sometimes I go to the piano, planning to work on one piece, and because it isn't close by, I end up playing stuff I already know. That's enjoyable, but I won't finish a piece I am not working on.
Third- Get out your tracking sheet(s). Tracking sheets are what they sound like. A way of keeping track of how much of the music you have learned and how much you have to go. Think of them as progress bars for a piece. You can easily create them yourself by going to Tracking Sheets to make them. Here's an example of a fancy-schmancy one I created for the Moonlight Sonata: