Be careful who you follow back. Blogs following you and they have no posts no set up of any kind will get you nailed fast - they are there to scam.
Be careful in your use of tags and keywords. Just don't run at this blindly. You are better off spending time working on your own domains and pushing traffic to them. I would use tumblr but do it casually and cautiously. Don't waste a lot of time on it. The tumblrs with biggest followers and most likes etc are the dumb ass ones not selling anything.
Don't link back to your blog, use small watermarks on pics. For adult, do not use the source option on top right. We had a big blog killed recently and I weaseled it out of tumblr peeps their bots check source and if adult site is determined. KABAM. You ded.
Again,