Just because you've always done it that way doesn't mean it's not incredibly stupid.
Some customs have been handed down generation by generation, all the way back to our forefathers. But remember: our forefathers were actually pretty stupid. They wore those dumb powdered wigs and everything.
If a pretty poster and a cute saying are all it takes to motivate you, you probably have a very easy job. The kind robots will be doing soon.
When you wish upon a falling star, your dreams can come true. Unless it's really a meteorite hurtling to the Earth which will destroy all life. Then you're pretty much hosed no matter what you wish for. Unless it's death by meteor.