I agree with everyone above (dudes this is such a lovefest!). As I tell anyone willing to listen, the most important things are your attitude and your willingness to approach your activities realistically. For instance: Uni's awesome, recently-concluded musical took tons of time and effort from its many participants. How do they see their roles in it? No college admissions officer thinks participation in an occasional musical implies serious talent as a performer. Anyone who participated in it with highly-selective colleges in mind is probably deluding him/herself. On the other hand, there are lots of other good reasons to participate. (i) Your friends are in it. (ii) People you wish were your friends are in it. (iii) It's fun to get in front of a crowd and sing/dance/speak in funny voices (that's why I teach). (iv) You've been getting way too much sleep lately and you wanted to take decisive action. (v) You want nothing more than to try something new. If you approach your activities realistically---taking into consideration that there are only 24 hours in each day---then I see no problem with dipping one's toes into a variety of ponds. Just remember that doing a single thing really well teaches lessons you will never learn any other way. Everyone knows btw that Andrea needs no brownie points in Physics because she totally owns Snell's Law but I will sprinkle some magic Fizix Pixie Dust in the CRC before the next quiz.