There is no such thing as 'later on'.

Allow me to explain: say that you happen upon a comic in an out-of-the-way comic shop with a prologue that, save for a couple of details, was written just for you. You're anxious to read the comic, but, for whatever reason, you decide to get it 'later on'. Cut to a few days later and you return to the shop, anxious to read more, only to find that the comic is gone.

I'm here to tell you that 'later on' is a dirty, fucking lie we tell ourselves to maintain the delusion of good spending habits or self-control. "Huh, there's a cute girl at the bar. Should I talk to her? Nah. She'll be there later on." Don't believe the hype. Life is to be enjoyed as soon (and as much) as possible, not 'later on'.