You earn a badge for each mini-quest you complete. It's honor-system - just submit a comment saying it's complete. To earn a main category badge, you must have a certain amount of mini-badges collected from each section, join the corresponding group, and post to that group at least 3 times. The groups are for sharing your experience, stating your intentions, lending support, inspiring others, giving tips & tricks, or sharing ideas & thoughts.
I've added a member system to the blog. It's free. You don't have to use it. You can simply post regular comments, but you won't be able to earn (and show off) badges. See the top-most bar on the blog - top/right - register/log in and access profile, groups, friends, activity, and new private messaging system. I always think this place is in need of more interaction, so it's there for you, if you want to involve yourself more. Again, optional. Use your profile to tell others who you are, add links to your own websites, post pictures. Post updates in your activity stream. Have fun with it!