You forgot step 3: Make it actually funny.
3. Make it the sort of level of funny where you never actually laugh, you just write "lol" in the comments bit underneath, because you got the "joke" (I mean that in the loosest sense).
Lol @ Penny Arcade.
fuck u .. xkcd isnt liek dat
people = shit
Bald and pig-like indeed sir.
... and then make your web comic smarter and funnier than this picture
Bald and pig-like are always fun and related
PA dig not fucking cool, and Maura and Indie Rock Pete never had any sexual tension to begin with. XKCD, just general un-named characters. Sinfest goes way beyond just boy chasing girl. And Rob and Elliot is so freaking random most of the time, Elliot's attraction to Noel hasn't been covered in ages. Massive Joke Failure.
While the joke falls flat for the most part, I find the penny arcade joke to be chuckle-worthy.
Oops, penny arcade is upside down in this.
handy dandy guide!