The objective is not to "make your links appear natural"; the objective is that your links are natural.
SEO is not synonymous to JUNK E-MAIL.
I'm a bit of a connoisseur of Google criticism.
Make your links from blog comments genuine.
When you've got 5 minutes to fill, Twitter is a great way to fill 35 minutes.
The next 30 days are going to pass whether you like it or not, so why not think about something you have always wanted to try and give it a shot for the next 30 days?