If trend trading, momentum or counter trend trading is not for you: try trading ranges. If that doesen't work try out trading volatility, calender spreads, yield curves or something else
I would second this. I have a partner who is not even really a trader, but more a business manager type. Trading, imo, can benefit from a team so long as it is not an analysis quagmire. I would suggest the Options route, and doing the sell-buy "some" method of profit taking. The "some" approach allows a better mental-psychological footing as well as risk management.