Work is sometime frustrating

Today I've been working for 9 hours on some problem and in the evening I was still not being any further. I guess that's life of every programmer. Well, I guess everybody knows this problem, but it's indeed very frustrating :(
Oh, well that's life. I guess it also makes life interesting :) hehe... well, a break will do good. I hope I'll still know where to continue after the break...