Google Making Me Good At Stuffs?
would let you enter in some goals that you'd like to achieve, roughly how often you'd like to practice those goals, and roughly when you'd like to practice those goals. Then, using Google's magical learning algorithms, the tool would look at when you "defer" the goal and when you mark the goal as "complete." Based on that information, Google then works out the best time for you to work on the activity. I have a few things I'd like to get better at, so I thought I'd give this thing a try.
How do I use this thing?
Next you'll put in your scheduling information, and schedule the thing. When the time to work on the goal comes up, you'll either go do it and mark it as done, or you'll defer it till later.