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Abundance of Cash - What should I do?
There's a few different types of investments you could do. As poolie mentioned, you could split your money between the Vanguard All World ex-US and Vanguard Total Stock Market index. A similar approach would be to invest in the Vanguard Total World Stock ETF. You wouldn't have to track separate fund performances, at the downside of not being able to allocate differential amounts to the US and non-US markets (Vanguard will allocate them by market cap). You could consider investing in country-specific broad market indices like the S&P 500 and FTSE 100. While not as diversified as the world indices, they are more correlated with the country's economic outlook. Other common investing paradigms are investing in companies which have historically paid out high dividends and companies that are under-valued by the market but have good prospects for future growth. This gets in the domain of value investing, which an entire field by itself. Like Andrew mentioned, investing in a mutual fund is hassle-free. However, mutual fees/commissions and taxes can be higher (somewhere in the range 1%-5%) than index funds/ETF expense ratios (typically <0.50%), so they would have to outperform the market by a bit to break-even. There are quite a few good books out there to read up about investing. I'd recommend The Intelligent Investor and Millionaire Teacher to understand the basics of long-term investing, but of course, there are many other equally good books too.