There's a great article
here on closing doors. On the way that people keep avoiding making choices that will close off their options, even if making that choice will clearly give them a better outcome.
I've been guilty of this an astounding number of times.
Still working on it :->
(cheers to
tamaranth)
Edit:
Cheers also to
diotina for
this link to an New Yorker article on irrational decision making referencing the same author.