Eliot,
There is nothing wrong with that strategy, providing:
1. You are selling naked puts on stocks you don't mind owning, at the strike you are writing.
2. You keep enough capital in your account to buy the stocks if you get assigned. (Also check with your broker about margin requirements.)
bvam1 is describing a collar which is a common way to go about what you are proposing. It will limit your downside, but will also decrease your return.
Ken Trester covers this topic in The Complete Option Trader. I have read this book and am about to review it on my site (I think it is a very good reference book for Options strategies):
http://www.options-trading-resources.com/Options-Trading-Books.html
There is another book that I just received from Amazon but haven't read called "Covered Calls and Naked Puts". I will also put a link to it on my book page.
I like to write covered calls for income. I pick stocks that I like for the long term and stick with them as they go down. If they go down, I simply write more calls, decreasing my cost basis each month. Doing this, it's quite feasible to build a portfolio of quality stocks with cost basis of zero and below. Therefore, I don't use collars.
Keep me posted on you thought process. I am very interested in it.
Regards,
Steve
http://www.options-trading-resources.com/EliteTrSig
Option trading information and tools the pros wish they had! A former Chicago Mercantile Exchange employee reviews stock option trading software, books, and web sites and online income opportunity.