I am sure there are many options out there, but I will share with you what I am doing.
Just to give a little background, I am essentially and entrepreneur and have started, bought, and/or sold several businesses over the years. None of them huge, the smallest was about $250k in revenue the largest about $7m in revenue.
During this time of owning businesses, I have been an active investor in mostly RE and stocks. By using my knowledge about business finance and investing, I have started an investment partnership.
I am investing my own money along with several partners. This allows me to leverage OPM while generating a reasonable return for all parties. My benefit comes from management and maintenance fees from the fund, which I reinvest directly into the partnership to increase my personal partnership value.
In 2008, my investments returned a -10%. Not exactly wonderful, but better than the S&P500. In 2009, it was a little over 100% return. I don't anticipate 2010 to be that good, 2010 was a bit of an anomaly.
By leveraging OPM it boosts my returns within the partnership. But it doesn't increase my time commmitment because I would be managing my money anyway.