I've been exposed recently, here and there, to something I know of through Nietzsche (GS 341) and popular culture, known as the phenomenon of Eternal Return, in which ones reality repeats itself an infinite number of times.
My first recent exposure to the concept has been when I watched (the entire television series of) Battlestar Galactica; a line that is constantly repeated by both Cylons and Humans is, quite similar to the line from Peter Pan, "All of this has happened before, and all of this shall happen again". And, more recently, I saw the 1993 Harold Ramis film, Groundhog Day, in which Mr. William Murray is forced to relive Feburay 2nd in an eternal loop (I had seen the film as a child, but recalled very little from it). Aside from being a feel-good Hollywood romantic comedy, it also brings up some core Nietzschean existential issues: for Bill Murray can only escape the loop when he has completed his mission of living the perfect day--of course, there are moralistic problems with the premise, for example that he improves himself only in order to impress the woman he desires--but otherwise it's thoroughly moralistic.
The only question is, what place does Eternal Return have in religion, and for that matter, Judaism? It is clear that it's origins are in what is known as the "Eastern Religions". Pre-Monotheistic peoples from the ancient Egyptians to the Hindus to the Greeks and even their philosophers believed in certain forms of Eternal Return and of course, reincarnation. And we also know that essentially, Judaism frowns upon reincarnation, or "גלגול" (as an aside, I came to the conclusion a couple of years ago that "גלגול\גלגל", cycle, wheel, is obviously a construct of the word "גל", wave, twice. In other words, a wave that would turn into itself would be a natural cylinder). According to the Torah we only live once, and it's our job to perfect ourselves in order to live out a possible eternal existence in perfection. Not that we'll just return again to this world, to live life over again. Luria and others have devised a form of reincarnation that fits in with the Talmudic conceptualization of Reward and Punishment, but it's not "essential Judaism".
I myself though, ever since I was fourteen years old, envisioned a helpful meditation based on a Groundhog Day-like treatment of Eternal Return (I wonder if that's where I got it from?) that is helpful in a Devotional way. It's also based partly on Luzzatto, who says (in MY) that one should only do something, or indulge in some halakhic leniency, if one is certain that he is doing it because it's permissible, not because his Evil Incantation is prompting him. My idea was that if you wish to do something that you know isn't right, but want to at least indulge in a little, you should think "How intrinsically correct and right is this act? Is this something I'd be ok with doing for a couple of years? Ten years? A hundred years? A thousand? Ad infinitum? If not, then that proves that it's not something you should be doing even for a short time.
May God have mercy on us and return us quickly to His Torah, Amen.