I should probably provide some insight to these sketches (if you like these explanations let me know and I'll keep doing them)

Sara dressed as Mario - Unreleased halloween idea, gave up after it didn't turn out very well (was a fleeting idea anyways)
Leah Basket - Was originally going to have a washroom background
Annalise Bath - The pose changed in the final version (pose only sketched)
Miknubby Starship - Rough draft for the Going into Hyperspace drawing
Spots In Heat - Just the sketch for the drawing
6 Year Anniversary v2 - Similar to the final version but the character order and Ryan's pose changed.
6 Year Anniversary v1 - Everyone stuck in a computer, was going to make it look like Strongbad's desk (minus the computer tower)
Doofy Clara Closeup - Unused comic panel sketch