It seems that,whenever I'm practicing a new skill, I never progressively get better at it; it just clicks. This has happened in various science and calculus classes, and, more dramatically, in skills such as unicycling and juggling.

When teaching a friend of mine how to pass clubs, for instance, we were clumsy and unsuccessful at first, and then suddenly something clicked and we were able to keep the clubs suspended in the air for about a minute. After that, we were good at it. It didn't feel like we were making progress throughout the afternoon, but then BAM! There it was; we had built the skill and it was there to stay.

Things always "just click" like that for me.