You will undoubtedly have dreams. Whether you dream of having the perfect house with the perfect car, or you dream of settling down to have a family, even if you dream of retiring by the time you're 40, the one key to success is doing something about it. It may sound obvious but if you dream of retiring before you reach 40 and yet you aimlessly skip from job to job with no hope of progressing a career, it is very unlikely you will achieve your goal.
Set goals and ambitions and write them down on a piece of paper. Make sure that you are always striving to reach those goals. Sometimes it can be difficult to get the motivation you require in order to succeed at your goals but you can use the goals themselves as the motivation you require. Keep your piece of paper on you and if you are beginning to feel downbeat or skeptical about your goals then look at your piece of paper and remember why you are
Structuring your life in this way, may seem like it loses its spontaneity but that doesn't have to be the case. Find a career you like, set up a business, and have fun doing it but always remember that if a good opportunity crops up you should take it with both hands. It is worse not to try something and not know whether it would have been successful than it is to never try anything.
Presuming you have set reasonable goals you should always be able to see a way to fulfill them. If you set goals that are too difficult you will find it incredibly difficult if not completely impossible to meet your goals. You should try not to alter them if possible, however, we don't know what's around the corner so we can't always plan for it. Don't see this as a failure but take the opportunity to reassess your goals and keep going.