Hi,
It's a silly little thing that I came up with because I started noticing that after each timed exercise, I couldn't help noodling a bit for 10-100 seconds. So if I would be practicing 15 exercises of somewhere between 5-15 minutes I could easily lose 10-20 minutes of my precious practice time.
So I thought of setting a second timer that is the accumulated time for my planned excersises so I could feel bad more when I started goofing away between exercises. It's been quite helpful so far. Just wanted to share this for people who might have a similar problem