In response to the opening thread, one tip that is very important for effective writing is
giving attention to to proper spelling and grammar and of course the ever important
punctuation. Sadly I have read a variety of blogs and even "News Articles" (Yahoo) who often make a variety of grammar and spelling errors. If a company or an individual writes a blog or an article but has spelling and punctuation errors, they lose credibility and in addition the attention span will wane.
Avoiding spelling errors and poor grammar is definitely essential to effective writing.
For more easy to read info on the topic of Effective Writing I would encourage you to look at the following quick read at:
https://www.eliteediting.com/blog/post.aspx?id=73
It's short and sweet and very very to the point.