Entrepreneur.com has a great introductory blog article that you should take a look at.  If you are wondering not only WHY to get into blogging, buy even WHAT a blog really is, this piece should clue you in.
The fact is, blogging is fast becoming an extremely important strategy for any online marketer. An effective blog [...]

How do I effectively comment on someone’s site?
This is one of the most frequently asked questions I get.  Every company online wants to create buzz about their company.  To do so effectively, you’ll need to pay close attention to the Dos and Don’ts of Effective Commenting.
Purpose
What do you want to get out of commenting?-The satisfaction [...]