You're getting good advice from all of the above. I really like Dan Sheridan's little saying which goes somewhat like this: Make plans in times of peace, not in times of war.
This means before you initiate the spread, you should know when and how you will adjust based on how the situation develops. Your plan should include a time component, and a price component because both of these are critical to your decision making. With many positions, you will also want to include a volatility component, as well (although with a narrow spread you will not have to worry as much about this).
Once you have set these three parameters, you have strategic choices that might help (see Mark's comments) , but remember that closing the position is often your best strategic choice.