Google is tricky. So, focus on what you can do at your end. If you are blogging justconcentrate on your content. Leave SEO to Google itself. I've never done any SEO for my blogs but I get thousands of visitors to my blog every day. I may be a bit extreme, but I don't want to concentrate on the forces like Google that I cannot/or have no control over their logarithms.
Here's what you need to do:
- Keyword research: Find some low to low-medium competition keywords. In the top 10 results you don't want to be seeing all DA 80+ sites, or sites with huge amounts of backlinks. Mozbar is great for determining this quickly.
- Create silos for your site: site.com/difficult-keyword/less-difficult-keyword-a, site.com/difficult-keyword/less-difficult-keyword-b, etc.
- For each of these pages, watch the over optimization. Get your target keywords
- in the TITLE, DESCRIPTION, URL in only 2/3 places. Use a synonym for the 3rd. In the content for each page, use the target keyword sparingly. Synonyms are key.
3. Throw 1-2 high PR/PA/DA backlinks at the top of your silo: site.com/difficult-keyword
This process is a low time-involvement, low-cost way to figure out a definitive answer to: should I keep going forward or not? If you're doing the right things, this method will always get you ranking.