One of the best books,you know, those ones that stay with you forever and becomes a part of you ... is the modern classic 'The Hitchhiker's Guide to The Galaxy' by Douglas Adams. And I'm pretty sure I'm not alone in this?
Within this great novel is one priceless handy hint, always carry a towel. My Japanese friends will back me up on this one, but I'll let the book do the talking....
"The Hitchhiker’s Guide to the Galaxy has a few things to say on the subject of towels.
A towel, it says, is about the most massively useful thing an interstellar hitch hiker can have. Partly it has great practical value — you can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble‐sanded beaches of Santraginus Ⅴ, inhaling the heady sea vapours; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon;... wet it for use in hand‐to‐hand‐combat... and of course dry yourself off with it if it still seems to be clean enough.
More importantly, a towel has immense psychological value. For some reason, if a strag (strag: nonhitchhiker) discovers that a hitchhiker has his towel with him, ... will think is that any man that can hitch the length and breadth of the Galaxy, ruff it, slum it, struggle against terrible odds, win through and still know where his towel is, is clearly a man to be reckoned with."
... and there we have it. Not only have I just provided you with the handiest of hints, you've also hopefully just found the next book on your reading list.