They think of something they want to do or need to do (or have always wanted to do) and they do it.

They find a way.  They make the time.  They stay up late.  They give up going to the gym or an extra hour of sleep or going into the city for the weekend.  

You can spot these people a mile away. 

Sure, they look a little tired but they're the ones with a certain glint in their eye. 

They are working ... on something.  They regret dinner invitations.  They bag going to the gym for the day or the week.  They don't call you back right away.  They *gasp* might not reply to your email within a minute or an hour or a day or a week or a month.

Then there's everyone else, with a million reasons not to do something.  There's not enough time.  They don't have the money.  It wouldn't matter to anyone but them.  It not worth it.  No one's going to care.  They can't do it perfectly so why bother.  Their parent's would think they are wasting their education.  Their friend's would think they'd gone AWOL.  Etc. Etc. Etc.

Which person are you?  

Which are you going to be?