I read a nice post at Web Worked Daily that holds the same title my post holds...

This post (click here to read it) talks about some very common mistakes that a web worker could do, I aggree that the post is focusing on freelancer web workers, but there are some very usefull topics that can contribute you something even if you are a salaried employee and you want to create yourself at the 'end of the day' a successful online career.

The post speaks also to team leaders that need to plan the project schedule, set missions to her team members (the actual developers), stick on deadlines and to deliver (at last) a fine working project to the development end point. In addition, this post also relates to project managers by that it shows some examples how to manage the specific project properly, how to devide missions in the right way and more...

AND, in the bottom line, it displays its 5 common mistakes...
Enjoy