Here are a couple of my sites that are doing well and moving up the Alexa rankings daily...some advice on SEO would be wonderful. Thanks ahead of time. http://guitarwizard.net http://golfbasics.org http://microsoftbluetoothmouse.com http://yankeeslogo.net
Hire SEO, easy way You can do on page optimization also start doing off page optimization start link building
You signature maybe can contain some keywords. You can hire seoer, or you should learn how to bulid quality backlinks.
yes, it will depend on ur content , keywords . suppose u have put better keywords , content then of course it would be help more