Your best strategy is a diversified portfolio in equities, ie stocks. You can do that with mutual funds especially index funds. Or a well chosen selection of stocks.
Yes switching to some dividend stocks and/or bonds is a good idea as you get close to needing the money. A laddered maturity bond portfolio is your best choice. Better than bond funds. Ideally when you retire you should have five years of living expenses in bonds. But keep as much in equities as you can for better inflation protection.