Quality much important than the quantity try to submit in quality directory.
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Those free directories with 0 pr are useless and now Matt Cutts has released a statement basically calling them bad neigborhoods. If you want to submit to a directory, shell out the dough for a high ranking one with a good reputation: Yahoo, joant, Botw, etc..
I agree with a lot of previous reply's...
1) I don't think you should strictly rely on directories..(blogs/forums etc...)
2)Your goal should be to get on as many HIGH PR sites as possible, but Backlinks from dofollow forums/blogs are generally better for your site..
Don't take much of your time submitting to free directories. Instead, focus on other things that you can do for your site for link building and promotions. I would recommend a maximum of 25-35 submissions a day will do.
I think the thing needs to consider is to have quality while submitting directories. Just do submit in such directories which have good PR and can gain some fast approvals. I think its not so easy but you can gain benefit if this method is done.
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