I've got almost 600 backlinks now!

Did you know how backlinks are important for me? I'm just shocked of the result that days ago, my blog boosted from no rank to PR3, and so as other pages from no rank to PR2. The last time I've checked in my blog using the Backlink Checker Tool, it was about 200+ I think and my PR at that time is only 1. But now, when I checked my backlinks after a month doing nothing especially web optimising, my backlinks are now at 584, which is almost 600, but my Alexa rank is still at 2,000,000+. I'm so happy now that my backlinks got improved over and over again, and right now I'm going to optimise them for sure until I got lots of improvements again in my blog. I'm very happy and it's a sign of success.