Depending on your potential major, you may not want to focus on completing the IGETC.
Transfer acceptance to specific majors, often prefer that a student spend their time fulfilling most of the major-specific pre-req’s, rather than prioritizing a complete IGETC sequence. Here’s a link to potential majors at the different UC’s and their campus specific requirements:
http://admission.universityofcalifornia.edu/transfer/preparation-paths/index.html