If you need more hours in the day, be sure to read “How to trick your brain into thinking your day is longer,” an article John found. (But if time is dragging and you want fewer hours waiting in line or being stalled on the subway, I suggest you try reciting poetry.)
Belle Beth Cooper writes at LifeHacker that intense concentration can make you feel like you have added on all the time you need to do whatever you are doing.
“Can you remember a period in your life when, if you look back on it now, time seemed to stretch on forever? … Chances are, you were probably doing something—or a whole bunch of somethings—that was brand new to you and demanded your attention.
“The funny thing is, by focusing on what you were doing, you actually slowed down time (or how your brain perceived that time, anyway). Neuroscientist David Eagleman” explains how it works here. …
“As we age, this process comes into play even more, making time seem to fly by much faster. This is because the more we age, the more often we come into contact with information our brains have already processed. This familiar information takes a shortcut through our brains, giving us the feeling that time is speeding up and passing us by.
“For young children, it’s easy to see how this would work in reverse, since the majority of information their brains are processing would be brand new, and require more time to process. …
“According to the research, if we feed our brains more new information, the extra processing time required will make us feel like time is moving more slowly.” Try it out. More of the science at LifeHacker.
Photo: Andrada Misca, lovingphotography.wordpress.com
The very image of concentration.
Suzanne's Mom's Blog 
I always wondered why time speeds up. Interesting theory. I’m not sure it works for me–I’m always learning/studying/trying to master new things, but it doesn’t seem to alter my sense of time when I’m doing it (or maybe theythings I’m learning aren’t new enough; I feel like I notice links and connections between everything, a result of in a wide-ranging liberal arts curriculum).
When I am learning a new thing — my first tai chi lesson, for example — I am completely adsorbed and random distractions and concerns can’t intrude. But doesn’t that make time fly? I admit I don’t get this science. I am pretty sure that when I am deeply absorbed, time goes quickly. It doesn’t seem like an hour turns into a day. But I present the link for what it’s worth. Some folks might like to do the experiment with the eyes that is described there.