Never, never, never ever give up!
When I started IM I didn't have a clue where I should start. I've did many techniques, but none of them were profitable. I didn't make any money.
Until I've made my first 0,13 cent via AdSense. From that moment I knew that if I could scale it up, and keep on going, I could make a lot of money.
I've had plenty of days that I didn't make any $. But everyday I spend 2-3 hours on my websites. Some days I didn't get any visitors except myself, and sometimes I wondered why I started at IM and why to spend time at it.
But there will be a day where you will see your first $$ and your first succes.
And that is what motivates me. I know that if I spend enough time on my websites there will be visitors and visitors = money. As long as you've made just a few cent on it, you can scale it up and earn a full time income.
Point is: there is no get rich quick. You have to spend so much time on it. But the reward will be big.
Never give up! This video is great motivation: http://www.youtube.com/watch?v=lsSC2vx7zFQ