An email list is a vital tool to blogging and online business. It helps you acquire site visitors and turn them into regular members of your audience. It also helps you connect with your audience, something you can do more effectively if you use your email list to segment them. The end result is more a consistent flow of traffic as well as more buzz when you're ready to launch your first product.
This is an important one. If you don't know who your audience is, you don't know whether or not the content you're creating is truly having a positive impact in your niche. Sure, you can rely on keyword research and analytics to steer you in the right direction, and you should, but you should also consider forming a deep understanding of who your audience is, what they want and what problems they're facing.
Unless you have a very good reason (unlikely), do not use the Plain or Numeric structure. They don’t play well with Google and other search engines because search engines use words, not numbers, to understand what your posts and pages are about. Search engines will be more likely to send people to your site when search words match the words in your permalinks.

Most people that start a blog might not understand what they're in for. They might not fathom the amount of work that's waiting for them. Sure, gone are those 9-to-5 hours where they need to sit in a cubicle with their heads down or in some office on the 12th floor in a corporate building in some business park, but so is the guarantee of any semblance of pay.
Working with advertising networks isn’t your only option when it comes to selling ads. If you end up with enough traffic, advertisers may come directly to you and ask you to place their ad on your site. You can also contact advertisers yourself. The biggest difference from the above mentioned option is that there is no middle man, which means you can set your own ad rates.