Quote from Big Money:
Lasner,
Writing naked options isnât recommended unless you have very, very deep pockets and donât mind an occasional massive loss (just ask Mark Cook). Having said that, it is your money so the only thing I would recommend to contain a loss is to buy an option above (if selling calls) the strike price of your naked options (thus they arenât naked but you get the point). How far above it based entirely on your risk tolerance and how much pain you can endure. This will protect you from a monster move up for whatever reason. The farther away from the current price, the less you will pay in premium for your protection but the more risk you bear. Pick your position tolerance. Not sure that is what you want to do but that is what I would do if writing options.
Best of luck
TM