Yes directory submission is very essential to every site. It can give you extra number of visitors to your site.
it is very useful! btw, to diversify your links use not only direcroty submission, but reciprocal linking too!
Sure, any method that exposes your link to different sites is a good thing as long as you're not spamming, posting inappropriate content or violating any other web rules.
Directory submissions are very useful as part of a well balanced link building programme. Spend time submitting to well established directories that aren't clearly full of spam advertising.
I submit to directories too. I target the free ones first. I am planning to invest in some paid ones.
yes, directory links work, and if you have a local business or want to rank for local keywords than you need to do specific kind of directory links, called citations, this is how you boost your ranking in google
Yes all methods and techniques used in SEO are useful but directory gives you the result not quickly but really helpful in Pr and site traffic.
You'd have to say it can't really hurt, hopefully. Don't go mad adding your site to hundreds of directories every day though....
Yes, Directory submission is very useful for your site if your Submission in Directory is good Like submission in High PR websites, Fast Approval Sites etc.