Keep It Short Stupid! or KISS!
From what I observed with my own blog entries, a short blog entry is more likely to be read than a long detailed entry.
When you write a long entry you are asking a lot from the reader: To read on and on. That is time consuming. Everybody is pressed for time and looking at their watches these days.
I try to keep it short but sometimes I just can’t help it, I just go on and on.