I have mine set up for time blocks by goal. My max per habit is a 60 minute for Uni work because I hyper focus. Skillshare gets 30 minutes for active work on each lesson. Otherwise, 10-15 minutes. I use timers to task switching. I already use the 5 minute rule with my ADHD: if it takes 5 or fewer minutes, I do it right then. 

This is incomplete for the Moving goal. I'm blocking 1 hour total, but this week may only be 40 minutes.