So, trying something new may not always turn out so bad. Things are not always as bad as you think. My worst class was math, and every time we took a test, I was certain I had completely flunked it. But it wasn't ever as bad as I had made it out to be. Sure, it was still a C, but it definitely wasn't an F. Do things when you have the chance.
Extra credit is a good example.
Some students found that if they had done extra credit, they could have raised themselves a letter grade. Some teachers offered a lot of extra credit opportunities, others didn't. Some of the extra credit was easy, some wasn't, just like other things that may be offered to you. Those are just some of the things I learned this year. I also learned that to find the diameter of a circle you double the radius.