[Lizard]

If your goals are of variable importance, set them up to have prime number repeats. For example:

Goal A: 7 days
Goal B: 11 days
Goal C: 13 days
Goal D: 17 days

(Or weeks, months. Whatever time frame is appropriate...)
This will give you an order like A,B,C,A,D,A,B,C,A,B,D,A,C,A,B...
This isn't truly random, but a month and a half from now, it'll probably feel pretty random to your brain. You'll want to give your most important goal the shortest cycle, because it'll show up the most.
I saw someone else originally offer this as a way of scheduling longer-term projects for review. I can't find the link now.