I absolutely agree with, Ky!
I was like that some months ago. I would sit in front of the computer for hours and hours...and the day would just pass me by. And even though I'm not out there as much being "active" as a teenager should, I've definitely decreased my computer/TV hours. That's a good start.
As for looking for a job, I spent two straight weeks walking the streets, looking for a job. In my case, I happened to get a late start, and a lot of the jobs have been taken by all the other "early birds"- individuals who wake up early, and get a head start (much like the bird finding the worm).
Dude, if you're 24, and you're sitting in the house waiting for an opportunity; you're day is never gonna come. No offense intended. Living with your parents is fine, but you have to at least go to school, get out the house 95% of your time there, and more importantly getting a job. Like...now.
If you're tired of your parent's getting on your back, you need to take the initiative and get up EVERY day looking...All. Day. Long. If you think you're missing something important online...you're not. The computer is going nowhere. However, I need to practice what I preach.
Again, I reiterate what I said above. You need to get out there and do your job, as Man find a job. In your case, something that will be your life-long employment. But for now, just looking for a job in general has to be your MAIN focus.