It's quick & easy tips : with one page G+, you website will be on the first page with your keyword.
Steps to follow :
1 - Create your Page G+ (Title of the your page G+ must be your keyword)
2 - Link your website to your Page Google+
3 - Write some contents on you Page G+
4 - Wait for 2 weeks max, and search on google bar with your keyword to see the magic result.
You can see image explanations here : Votre Site sur la 1ere Page Google grace à une seule Page Google+