If we learn from other people's mistakes, we get the same knowledge, without the agony!

So, what's word on what not do do?
Here's a couple of biggies:
-Never supply too much information. You may inadvertantly verify your negatives in a manner impossible to remove later.
-Don't close accounts for the sake of closing accounts. They may be helping you!
-Don't dispute positive information! Positives invariably get deleted.
-Don't deal with collectors or CRA's on the phone, unless you are extremely confident and have nerves of steel. Even so, a paper trail can be so important......
-When adding new credit, don't carry balances you can't quickly pay off (better yet- don't carry balances at all). Solving one problem while creating another still leaves you with a problem!
Don't tell anyone from NCO to "have a nice day"
Others?