Another example, whenever I send emails to myself, I give them ridiculous subject lines. I realized that today when I typed P in to the subject box and 14 previously used subjects of "Prizzintle", "Plz to Print Me Sir" and "PRINT OR DIE!!!!" popped up. No one else sees these, until now not many people know about them, but I do it every time. And every time I go to the computer lab and go to print what I just emailed myself, I giggle a little. "Heheh, oh me from 5 minutes ago, I'm gonna miss you."
Another thing I love is jokes for other people as little secret presents, for instance, the octavio contact. If you don't know what that is, you will soon enough. For those of you that know what it is, I leave you with this: