I do a lot of comments, just like watching other (big and small) blogs, you can learn a lot of it. And once you're there, why not comment on a post? Didn't do it one day and had a lot less traffic. I trie to do the blogs that I follow, and then if I have time I also comment on other blogs!
I don't have particular target a day. Whenever I have a chance, I visit the blogs of the bloggers who joined my site - randomly. And when I visit their blog, I check out two to three posts. Sometimes, I comment in all the posts I read. Sometimes, I just comment in the post that I find most interesting. =)
It always seems a little cheeky to me to add your link - unless it is super relevant t the comment your making. Besides which, other viewers can click on your name and usually track your website down if they wish. I find quite a few people seek me out that way - and they are usually the kinds of readers that will come back:)!
This is my bad habit! I read so many blogs, but feel I don't have the time to comment on all of them. I'll have to be more mindful of leaving a thoughtful comment more often! I've met some awesome bloggers this way and highly recommend others leave comments as often as possible.
I comment occasionally. Simply because I have something to share. If you guys are really into commenting blogs, I recommend signing up at Entrecard.com. Its a good site to exchange links and a marketplace to do your blog commenting mayhem. Of course, don't neglect to post new content every once in awhile.
I comment if I have something to say - but sadly I sometimes don't leave a comment even if I absolutely love the post! It's not because I don't want to - often my kids need me and so I run off and never get around to finishing my comment! Sometimes it's nice to comment just so that the writer isn't left hanging... It can be really hard at times to know how well a blog has been received, and if indeed anybody actually read it properly all the way through! A genuine and pertinent comment can make all the difference for the blogger:))