Search Engine Optimization

I have been working on learning what search engine optimization is all about. I want my blogs to get a good amount of traffic. This one gets good traffic and my stepfamily blog gets a great amount of traffic. However, I need to work on getting traffic to some of my newer blogs still. I want to drive them up in the search engines when somebody searches for a particular word or topic so I am learning about seo services. I just want to keep my blogs interesting and useful.