http://www.wikihow.com/Main-Page
Reserving judgment for when the inevitable improvements are made to this wiki, ’cause my first search with WikiHow – for “clear blocked drain” – resulted only in shocking step-by-step results on neti potting and embalming. (I don’t know how much clearer I was supposed to be!)
***BUMPITY BUMP***
Blocked drain cleared using only my own gumption, and a plunger purchased at the dollar store. Full disclosure: The plunger accomplished more than the gumption did.