Read Option Volatility and Pricing by Sheldon Natenberg. The mother of all options books. Selling covered calls is a great idea if you are planning to be long the stock. You won't get exercised unless the stock is $22.59 or greater, and you rode the stock up 6 or 7 bucks. One way to think of it is you are capping your gain if the stock makes an extended upward move, as at expiration there will be no time value and only intrinsic value left. I'm a fan of selling front month and next month options rather than options that expire in 5 months.