It's a waste of time. The alexa ranking is just a traffic ranking for a small sample of people. Focus on increasing actual traffic and the alexa ranking will improve on its own.
if webmasters visit your site, your site's alexa will improve easily. because webmasters mostly use toolbars.
Alex is crap. Don't bother. Focus on Social Bookmarking...StumbleUpon or Digg for instance. Alexa is not the indicator that it once was (if it ever really was)
I do not think that Alexa is an indicatror to value your site , but anyway try to get users to install Alexa toolbar in thier browsers .
None of these ideas will get anywhere near Alexa 100.000-200.000 In order to increase your Alexa rank, you should work hard on driving as much traffic as possible. Anything will help: link exchanges, paid traffic, social bookmarking (especially StumbleUpon), etc.
There is no impact of alexa rank on your site or on your business. So leave it. Try to work for improvement your site and increase your site's visitors. It will be more beneficial for you. Good luck.
Your asking the wrong question here, the question you should be asking his how to increase traffic because this has a knock on effect on your alexa ranking and many other things too. Here is a good article for you to read http://www.back-links.org/12-Ways-to-bring-in-targeted-and-untargeted-traffic.php
As i know alexa ranking is based on the visitor who using alexa tool bar, your ranking will be improve if more and more visitor who using alexa toolbar are visiting your website