Niches? Good niches, bad niches? I own a blog and don't know how to categorize it...How about pr whats that? Anything else I need to know, all help appreciated thanks..
concentrate on building a good blog that your visitors will find useful. Read up here at DP forums on SEO, and dont worry about PR, CTR, EPC, eCPM or all those other things.. worry about those later..
Take 2-3 hours out of your day and just sit and read random threads on the forum. You'll gain a ton of knowledge. Can't comment on niches. I say a good niche is one YOU enjoy. That way updating your site won't be a drag--kind of like not wanting to go to work. PR = Pagerank. Google it for more information.
Yeah.. as Tearabite said, just concentrate on making a blog which will be useful to your visitors. You can think about those PR and all later.