This are several different techniques that many bloggers use to drive more traffic and to make higher page rank.
1. Go to Forums and talk with other people. That way, you find out what they are interested in, you direct them to your blog so they can find solutions, and eventually their word of mouth increases the process of people that can hear about your blog.
Don't forget to create forum profile and signature, and include a link to your blog! That will automatically create tones of backlinks to your blog, and that counts a lot for your Google page rank!
The same rule goes for:
Google groups
Yahoo groups
Any kind of groups...
2. Write long comments on some very popular blog (i.e. some of the Google's blogs, or problogger, or www.draganvaragic.com , etc.)
Some times (at the very begging of your blogging career) this can and should and will bring some traffic to your blog, especially if you offer good quality and fresh content.
Don't forget, you should write on blogs within same topic as your blog propagates!
3. Use blog networks! Put your blog there, and keep track on your progress!
4. Facebook - friends, groups, and most important: blog networks!
Check out some of the most populars:
Also, don't forget to check out my blog network:
5. Twitter! Nowadays it is a starting point for most professional bloggers!
I already wrote in details how to use twitter effectively!
6. Once you decide to go totally professional into blogging, then a must do is:
Google AdWords!
For cheap money, you can get yourself a great traffic!
I can't claim the same story about Facebook add program, so you will have to try it your self and make your own impression!
7. Friend feed, Digg, Stumble upon, Del.icio.us, Blinklist, Redit, ...
8. Panoramio
If you are writing a blog which relates to some city, or tourism, you can get a lot of traffic just by uploading your pics on Panoramio and/or Google earth.
Especially for the popular places - like I am doing it for Copenhagen, but also for the places where I am traveling to!
With that said, one more add: a must use tool is: www.mapmysite.com
This small peace of javascript code give really powerful effect to your blog!
9. NEWEST
Google search wiki is now live!

I was playing with searching my full name, and for personal use, I got pretty good results. It might be good idea to open several Google accounts and favorite your url.
Eventually, it will make difference on your total page rank!
My theory behind this is that big web companies (facebook, linkedin, yahoo, ms, etc) they have huge number of users, resources, servers, ip addresses, etc. so it makes it a little bit easier for them to create tones of back links and increase page rank for their pages about you. That's one of the main reasons, why I use to find my Facebook of Linked in profile before my home page (which I find more relevant about me then My Facebook profile)
Unfortunately, that is one of the mistakes Google won't be able to fix, as their search will always be as blind as machine is!
But this wiki live search is a fair chance to solve this!
Good luck G!
UPDATE COMING SOON!!!