Tumblr is a goldmine for niche blogs, normally involving creative uses of photoshop, topical memes and just plain silliness.
Though the micro-blogging platform has ways to discover content, with more than 62 million blogs, it's nearly impossible to find them all.
Some Tumblr sites quit after hitting their peak, while others maintain a consistent serving of funny -- sometimes leading to a book deal or sweet writing gig.
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The Beginner’s Guide to Tumblr