I find that newbies are getting attracted by blogging. In hurry they setup blog and start blogging. After few days their enthusiasm gets evaporated and they forgot blogging. I think they should take care of atleast few things like below :
1) Decide on which topic you are going to write.
2) If you like writing on this topic?
3) If you have enough knowledge or experience of this subject?
4) If you are going to write it regularly.
I think this is just basic things every blogger should follow. Fellow experienced warriors will expand the list.