There is no shortage of investing strategies but successful ones generally follow some common principles laid out by Benjamin Graham (with my paraphrase and comments):
- Always invest with a margin of safety by finding good companies trading at a fair price or better.
- Expect volatility and profit from it being cautious when the market is irrationally exuberant and dollar-cost averaging your purchases.
- Know what kind of investor you are – are you a long-term investor or a trader? Both make money but in very different ways.
Of course, you could always hire a professional to either help you or take on the investing task for you. Your money, your choice.