From House's Head:
1. "Either I'm massively drunk"...or I have a concussion.
Don't confuse the two! See Sleeping Man.
2. "I have a concussion. Retrograde amnesia. No cell phone. No keys. I've been mugged."
Yes, you have! See Sleeping Man.
3. ETA: How could I forget this one: "Smell is the strongest...evokerator of memory." See the climax of Sleeping Man.
From Wilson's Heart:
1. The end of the bar scene: House forgets his cane when he gets really drunk.
See Gotta Run.
It was fanon. Now it's canon!
Coincidence? Or genius? You be the judge.