You must fail
No, I don't want to scare you. My point is...failure is good..if you see the good site. Wait, failure has a good site? Surely it does! There is a lesson in each failure. And if you take that lesson and learn it, you win! So, failure is not a failure for itself if you take the lesson and make sure you learn it so you won't repeat the same mistake again.
Test & Track Everything
Yes, in business, testing and tracking is everything. There were some things in which I were 100% sure would work and they didn't. Also there were some things which I didn't think would work in my dreams and they worked like crazy! Do you want to know if some new internet marketing idea or maybe a new way to acquire leads is working? TEST IT. And expect successes and failures. If you reach failure, remember that failure is good if you take the lesson of it. In this case, you've seen that the method you tested doesn't work. That's very good lesson to learn.
Look from other person's perspective
If there is any one secret of success, it lies in the ability to get the other person's point of view and see things from that person's angle as well as from your own. - Henry Ford
Do the exact thing Ford said. When you have a new idea, for example creating new marketing campaign, ask yourself: If I were the person who saw this commercial, would I be persuaded to that product? It's simple, it's obvious and it's VERY POWERFUL.
Learn from the best
Learn from the people who actually MAKE MONEY. Not of those who say that make money, or from those who say they are going to make money. Or maybe those who pray to earn money. I have written a great article about a list of resources where you can find people who make money, it is available here.
Take total responsibility
If something doesn't work, take total responsibility. Don't blame the circumstances. Maybe you should try to do the same thing again, this time with more attention. Taking responsibility is the most important thing towards the feeling that you have control and can change the things that are happening around, not just blaming everything.
I hope this articled helped you get some crucial points about how to be successful in this business.