Pink Floyd's "Time" is probably the best reference I can think of. In their song they talk of "picking away the moments that make up a dull day, fritter and waste the hours in an offhand way" Then like the previous poster suggested they talk about the consequence of the "And then one day you'll find, 10 years have got behind you, no one told you when to run... you missed the starting gun"

I think you need to find your message or emotion youre trying to convey. To me the best songs put you in the frame of the singer/songwriter so you can connect with how they felt when they sung/wrote their song.