1) Invest & Diversify in low risk companies that all have a typical track record with ROI's of 50% or more(meaning to stash more money in the highest ROI companies and less in the lower ROI companies);
2) Pick the companies in (1) with the highest volatility and trade frequently with an AIM Variant(preferably having picked companies in (1) with a corelation of -1).
The problem is that one needs some money to get started.