IT addiction no. 4: Old methods
If you're still clinging to the methodologies you were using 5, 10, or 20 years ago, you have a monkey on your back -- and it has a gray muzzle.
For example, software developers who cling to waterfall methodologies or structured design techniques can end up creating software that's obsolete before it's even implemented, or pouring valuable resources into creating documentation no one else will ever read.
The cure: Get agile. Adopt modern methodologies like extreme programming or behavior-driven design. Develop an understanding of the underlying business processes so that you can communicate intelligently with the people who have to use what you build.