How do you troubleshoot problems with wireless connections?

Wireless connection problems are very common nowadays. What are the steps you need to follow in order to understand what is wrong with a wireless connection and how to fix problems by yourself, without calling for any tech support?

For people having this type of problems, I put together with my team from 7 Tutorials a step by step chart with questions and answers. The chart guides you through most (if not) all possible root-causes and the solutions for them.

Troubleshoot Wireless Network Connection Problems by Yourself

The source article, can be found here: Troubleshoot Wireless Network Connection Problems by Yourself.