1) If you do what you've always done, you get the results you've always gotten.
2) Someday never comes. I majored in Theatre Arts. Everyone in the department had plans for their professional theatre career, the theatre company they were going to start, etc. 90% of them never even attempted to get a job related to theatre, it was still something they'd do "someday." But someday never gets any closer. I've seen it again and again since then -- people often seem in awe of others who achieve their goals, but they key thing that those who achieve their goals have that others lack is the fact that they actually made the attempt. If you're planning to do something "in two years or so," (for example) start telling yourself you'll do it "around June 2008," or else two years from now, you'll still be saying "in two years or so."
eh, I'm tired and can't be concise right now. I've got some more but they'll end up three paragraphs long each. (random half-remembered quote: Mark Twain once said, "A 15-minute speech takes a week to prepare. If you want the 3-hour version, I can do it right now.")