Stock Account? ETFs please

So in case you were reading our suggestions and thinking, well all I have is my TD Ameritrade account or whatnot, how am I supposed to be buying into all these markets? Well, ETFs to the rescue. From investopedia for those who dont know an ETF is:

"A security that tracks an index, a commodity or a basket of assets like an index fund, but trades like a stock on an exchange. ETFs experience price changes throughout the day as they are bought and sold. "

You can almost find an ETF for anything out there and etf stock encyclopedia is one of my favorite sites for this. Just beware that most ETFs slowly lose value over time and you should always research the exact holdings of what they invest in. So Goodluck trading.