Any new ideas on how to promote the blog?

I've had a lot of success in promoting the blog on Google + , and on a local forum, I'm up to 541 Google followers, and the number of page views explode when I post a link to a post on the local discussion board, but I'm always looking for ways to reach out and promote the blog. You can never have enough readers.

Fellow blogger Godless Poutine has said that he uses the site StumbleUpon, has anyone else out there used it? Is it effective?

Should I use more social media, to make it easier for existing followers to add me and spread their favorite posts to friends? Should I start a blog page on Facebook and Twitter?

Please tell me your ideas, if you have any, and if you are a blogger, let me know what has worked for you in the past in generating readers.