Well, if you have an account for buying stocks most of those have tools in the website to filter stocks to your parameters. If you don't have a stock brokerage account, I recommend Scottrade for IRA's and Robinhood for brokerage.
The difference is that you can only put $5,500 a year in an IRA - but there is no tax while it is in there, but you can't take it out until you are 59 1/2. Scottrade charges about $7 to buy or sell.
A brokerage account is one you can buy or sell and take money in and out all you want - but you will have to pay taxes on any gains and dividends you get. Robinhood is good for this because they do not charge any fee!
Your simple question is actually difficult to answer because you need to map out your goals. But here is a good article to read to get started. Money and your future are very important things and should be taken very seriously. http://www.marketwatch.com/story/how-to-pick-the-best-dividend-paying-stocks-2013-05-02