Bloggers biggest mistakes

I just read and article that came to my email about the four main mistakes bloggers make that decrease your earning capability.
The article stated that most bloggers don't update their blogs enough, which makes search engine skip right over your site even if your site is the one looked for. Another reason was that blogger doesn't use keywords to tag their posts and we should put at least one main keyword in the title of our posts.
Another good way to make money with your blog is to monetize your blog by adding adsence ads and affiliate links to useful products that your readers may enjoy.
In my opinion another thing we all need to do as well is advertise our blogs to make people aware of them and getting backlinks to other relevant sites.