I think you meant "SEO". Main thing is to remember to focus each page about one thing primarily and use the page title to begin this with the target keywords you want the page found for. Then it's page content you should mostly concern yourself with...
You should have to comment on niche related blogs of high page rank, guest posting, social bookmarking of your blog and also share the link of your blog with social networking sites like Facebook, twitter etc..
TBH I am not sure with blogspot or even if you can. It's Google's and so not really your own as such. IMHO you would be better getting your own domain and using WordPress.