Business planning can make the difference between success and failure. Write down specific and achievable goals, along with an action plan for achieving them. Make sure you understand the benefits of reaching these goals, and you'll be more likely to get there.
It's essential to both develop and regularly review your business (and other) goals. Ask yourself, "If I knew then, what I know now, would I still be doing things like this?" If the answer's no, change what you're doing - quickly.