Stop watching TV (seriously, unplug it and put it in a closet). Stop playing video games (same deal). Stop going out barhopping. Devote your evenings and lunch breaks to working on your idea. You have plenty of time that you're not utilizing. You'll find that most startup founders - especially new entrepreneurs without a previous "win" - don't start by getting seed money thrown at them for an idea. They toil in every spare moment they have to produce a product that is worth investing in.
pg says "Running a start-up is like being punched in the face repeatedly" and it's true. You get to bust your ass 24/7, bend over backwards, wear sixteen hats at any given time, and learn at least 3 new major skill sets for no promise of reward, and a better-than-even chance of failure. If you're not willing to give it all you've got, then honestly, entrepreneurship probably isn't for you.