So there's this scene in the movie Inception where some of the good guys are in this gunfight with some of the bad guys and they're in inception so the rules are bent and one of the characters, Arthur, has really got his hands full holding off his attackers using a rather modest firearm when another character, Eames, comes over and proceeds to pull the trigger on some big grenade launching shotgun thing eradicating said bad guys. Walking off accomplished he drops this line;

You mustn't be afraid to dream a little bigger darling.

I love this line. We've all heard it. Preached it. Dreamt it. Tried to live it. But...

For those of us in start-up, do-up, change-up...perhaps a better mantra would be; You mustn't be afraid to Dream small, execute. Repeat.

To define action steps that you'll actually accomplish and then build upon.

That is unless you can literally manipulated reality by the power of thought, then by all means, proceed with bigger.