Any and all advice welcome - thanks in advance. I have a 12" PowerBook G4 768MB; 1.33 GHz. I'm in grad school and about to start my dissertation. I realize computers don't last forever, and I fear my computer could crash in the middle of all of my research/writing. (I do back up all my stuff.) My question - do I get a new macbook pro now or do I wait for this one to die altogether. And if I wait, should I/could I do anything to the G4 that will keep it going? If I'm leaving out any info that would be helpful in answering my question, please let me know. Thanks!