All great advice so far! While I wouldn’t exactly call myself a veteran, I did use Beeminder for all of 2015, then stopped in early 2016, and have used it for all of 2018 so far, meaning I’ve been on here for a total of about 18 months, for what it’s worth. I’m going to echo advice that @philip gave in an old blog post some time ago that I’m having trouble locating at the moment: it’s easy to overload the system with either volume or intensity. When I started up again in the early days of 2018, I figured that I could handle quite a few goals right away because I had before. But the act of keeping up with all of them, even the really easy ones, was a new habit that I hadn’t gotten used to yet. I had a lot of derailments.
Assuming that you’ve figured out how many goals you can reasonably handle, you don’t want to overload your system with intensity. Generally, I only ramp up the difficulty of one, or at most two, goals at a time. Even when I’m already doing something at a rate equal to or greater than the new rate I’m dialing in, I pay some special attention to that goal for a week or two while the new rate is taking effect. I also increase rates very gradually. I had my Duolingo rate at 50 points a day for quite some time, and have now decided to double that and start taking my French learning more seriously. I just increased my rate to 60 points a day last week, and hope to have it at 100 points a day by the end of the summer, but I may take longer if I need to. Point being, the aphorism “know thyself” becomes critical here. You have to really pay attention to goals as you dial up the difficulty on them to make sure it’s working, and if it isn’t, it can be difficult to find out why if you aren’t paying attention.
A lot of that may very well be redundant, but I hope it helps you!