I already have about $185,000 invested in my 401k. This is split bewteen S&P500, S&P mid-cap, International, Low Price Fund, and company stock. I wanted to invest my Roth into funds that were not available within my 401k, and also wanted to focus on more aggressive funds. If you see the chart below, you will see how the funds I chose have done compared to the S&P500.
The S&P500 index is made of of 500 companys chosen by committee to reflect the large-cap market. I wanted funds that have outperformed the S&P500.
The funds I chose are iShares Dow Jones US Real Estate (IYR), iShares S&P SmallCap 600/BARRA Growth (IJT), iShares MSCI Emerging Markets Index (EEM), and iShares Dow Jones Select Dividend Index (DVY).

I chose the IYR since it is based on real estate, and tends to track differently than the general stock market. This allows me to invest in real estate without having to be a landlord. It pays a pretty good yield.
The IJT is a small-cap fund. Small companys have more potential to grow than large companys. A small-cap fund allows me to invest in variety of small companies. Small-caps have historically beat the larger caps over time.
The EEM allows me to invest of foriegn companies in emerging markets which are higher risk, but have a potentially higher reward. Since this is a fund of many companies, the risk is vastly reduced.
The DVY fund invests in companys that have repeatedly increased their dividends, while still reinvesting 60% of thier earnings back into the company.
In the chart below, the S&P500 is represented as “_GSPC”. The other funds split off from the S&P500 index line as they were created. You will notice that each of them move above the S&P500 line increasing over time.
IYR, IJT, EEM, DVY versus S&P500