[damaniac]

A couple friends of mine tried something like that (the future self thing). They had two friends with very similar-sounding voices, one of whom was both spacey and a bit imaginative. They had friend 1 call this guy (friend 2) when he was asleep, late at night. So he wakes up, still groggy, and hears someone claiming to be his future self talking to him. He tells himself to keep working on a particular song (he's in a band) because "It makes us famous one day." The next day, the band is sitting around and the guy comes in and says, "You guys will never believe this..." To this day I think he believes it actually happened. The song has yet to make him/them famous.