There’s a book entitled, “Overpromise and overdeliver.” The title is a good principle generally. As James Altucher explains, “Over-promise sets you apart from the people who under-promise. 
Over-deliver sets you apart from people who just delivered.” 

The principle breaks when overpromise or overdelivery puts you in a position to fail to deliver entirely. 

If it puts you on a path to preciousness, perfectionism, and procrastination, don’t do it. If it makes you make something bad, just to get it done, don’t do it. Just apply a regular effort.