The word "failure" has so many negative connotations - and in fact, there are many negative things about failing to accomplish something that you set out to do.
However, failure has an "up" side.
Failure is a lesson to be learned, not an indication that you can't succeed. If you do some research on the most successful people in the world, you'll find that their careers are marked by numerous failures. The difference between them and most other people is that they did not let their failures deter them from working towards their grand visions.
There is no such thing as a total failure. Whatever it is you're doing, if the overall effect is not what you wanted you can always find some part of the process that worked the way you anticipated. The trick is to analyze what did work well, what didn't work out that great, adjust your methods, and try again. It may take several tries to start to get the results you were looking for, but when you do, you'll have a workable method in place. As you make progress in your business and learn from your experiences, these processes can be refined even further to achieve even better results.
Even Thomas Edison had his share of failure. It took thirteen months and reportedly over six thousand attempts to develop a working light bulb. When challenged by a young journalist to abandon his efforts, Edison replied "Young man, don't you realize that I have not failed but have successfully discovered six thousand ways that won't work!"
Look at failure as a stepping-stone to success; a stepping-stone worn smooth by some of the most notable names in history. The path isn't always easy, but the journey is immensely rewarding.