I need a topic for blogging that is "rewarding" or gives higher CTR...I can blog anything....just need advice before I start.
Blog about things you do or services you're wanting to offer, ideas and tips for webmasters and newbies.
One idea is to find a site that has very high PR, high rate key words and has newsworthy content. Create the blog using the high paying keyword in the blog name. keep referring to the site with the news content and make your posts form each article but summarised in your words. Works for me.
I know you said you can blog about anything, but really really pick something you like. After all, a blog can take an awful long time to become successful, so you need to make sure you won't tire of the topic.
If you dont have even a small amount of interest in the subject your blogging on you may find that even if it makes you a little money it may become tiresome to keep on writing on something when your hearts not in it. If you are helpful and can create reasons for people to return then its going to help somewhat.