In the long run you only hit what you aim at.
Therefore, though you may fail to begin with,
you should aim at something high.
Clear goals are important because they provide you with something to look forward to. Financially qualifying where you wish to be at some point in the future gives you both a target to aim for and something to measure your progress against. The thing about all goals is they should be SMART.
SPECIFIC: What exactly will you accomplish?
MEASURABLE: How will you know when you have reached your goal?
ACHIEVABLE: Do you have the resources to attain your goal?
RELEVANT: Why is the goal important to you?
TIMELY: When will you achieve your goal?
Ask yourself these five questions when you set yourself a goal and you'll go a long way towards achieving it.