I invest in companies with strong fundamentals which are also significantly undervalued, presenting a good margin of safety. I write extensively about my ideas and investment strategies on my blog at Soberstocks.com
I'm trying to be a swing trader. I've lost money in the past by holding on to losers. Lately I always cut losses below 5% and aim for 10%+ gains. I sometimes miss out on winners, but I'm in the black now and feel I'm making good progress.