What I do is I have one keyword that I target for my homepage and use that in the title and header 1 on the front page and write at least 1,000 words of content using that keyword and stick it to the front page. I then find other keywords related to my niche and use them for other blog posts.

thanks i do the same the main keyword is for the main article ,then i focus the other posts on other keywords of course related to my webpage ,may be keywords that have more searches for month etc etc keywords i could not compete with .example while i focus to be on first page with "healthy fruit for dogs" main keyword ,i write an article about the keyword dog and another about how to keep your dog healthy (just an example)

I target different keywords that are almost related to my blog...

When creating new content for SEO purposes, you want to do the following:

#1: Write for related keywords (adword tool will find those for you) an target low keywords with under 500 searches per month each.

#2: Write for semantic keywords and follow the same criteria as above. For example, if dog training is your keyword, puppy collars would be semantic, where as dog training collars would be only related. Make sense?

#3: Write original, high quality content, that humans want to read.

Voila - more traffic for you!

If you do some keyword research for long tail variations of your main keyword you can rank well for related keywords with hardly any effort. This in turn will drive additional traffic to your site and help you rank for your main keyword.