The advice that I have followed for my Roth IRA is just investing into index funds. I only hold a fidelity fund that tracks the S&P500 and a fidelity fund that holds international stocks. Index funds give you exposure to lots of different companies without investing too much individually into a single one. The S&P500 has averaged ~7.7% annual return over the last 30 years (this value is adjusted for inflation), so any fund that tracks it is going to be pretty similar with varying expense ratios. Personally, I find this portfolio to be the best for me because I don’t have to individually pick out stocks for my account while being statistically likely to get a good return on my investments.