Knowing when to say no...

To myself. The most frustrating part of my personality is that I want to do everything. With this semester rolling to a close I'm ready to jump back into school full-time for a MA in Science Ed. I also want to continue my GIS training with some on-line classes to pursue a professional certification, take a quilting class, form a Outings Club, work full-time as a GIS Specialist which just today expanded to county Webmaster as well, work part-time for the census bureau doing field work, do a bible study, get involved with my churches ministry, create a side business with web design, take a photography class, take a pottery class, re-landscape my yard, join the gym to jump back into my running training, get certified as a yoga instructor, buy a house and turn it into a coffee shop... I have a zillion ideas! I think what I need is a clone...or three! I don't know how to prioritize this part of my life. How do other people practice this form of discipline? Maybe I should just sleep less... :)