I've decided to finally start setting financial goals. I never believed I needed them, but it makes sense to aim for something measurable and possible in order to focus my efforts. I would like to attain a quarter million dollars of total net worth within 5 years through all possible means (trading, short-term investments, loans, equity-stakes in business, etc.). I haven't decided how specifically to save and invest, I have just decided on the monetary goal and the time frame in which I want to achieve it.
I believe my expectations are achievable. I would like some advice though, specifically with financial goals and accomplishing them. When you have a goal in mind it sort of motivates you to do everything necessary to reach that goal; when you don't have one you may not push yourself as hard to save and invest.
Would I best start by setting money aside? How much? What kind of returns can I reasonably expect?
Ignore specific skills, income level, etc., and just look at this from a general point of view.