Mutual Funds are a tricky area so read the tips here as they can help you with your choice making. Try to keep the fees low and know that they should not be higher than 1% if you are working with domestic equity funds. Next, look into an index fund. In this case, your manager will buy a stock from the index and with little work being done on his part, the fee is low. Most mutual funds do not do as well as index funds, even thought it is a simple method of investing.
The strategy, you must evaluate this. International stocks, small cap stocks and riskier stocks will generally be more aggressive and that is the one you want if you have a long term outlook.
Once again, go for the low fees. It is this area that trouble is generally started, so make sure that you are not paying to much in the way of fees to the mutual fund. These fees are seen as hidden in the way that they are not an upfront fee but a percentage of what you have in your account.