"Stay hungry stay foolish" - A great series of vintage cards with inspirational quotes. Some are funny, motivational or the statement you were looking for so long. You also can send them as a real printed greeting card via App: MyPostcard App
Definitely something I need to work on as a young professional. I am a rather boring, forgettable person and I don't do the whole fake butt-kissing/networking thing, so I need to make sure the quality of my work stands out.