make money from a blog

Blog - Can I make money from a blog ?Blogging to make money, is it possible ? I am pretty sure it must be because there are quite a few people out there who suggest it is. They seem to have an excellent grasp of everything you need to do, but have generally been doing it for a long time, and usually seem to have an existing website from which they already have a large amount of traffic.What I am going to do is to keep a weekly diary of what I have done towards my blog (outside of posting) and achieved in earnings. I will not be spending as much time on the blog as some, as I have a full time job and plenty of other interests, but will certainly give it a go.