The zone is a mysterious place familiar to deep thinkers. It is a mode of consciousness in which you are almost superhumanly intelligent and productive. Hard problems are solved in the zone. Getting into the zone is not easy, but it pays off. The downside to the zone is that it raises your expectations from yourself and others so much you will never be satisfied by normal again. The upside is that you realize what you are truly capable of.

In the zone, your mind is a blade, a ferocious form of violent, nearly malicious intelligence.

$ python -c 'import this'
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way ma

I love reading, I love books, and my friends say I have an overactive imagination. So it may not be terribly surprising that back in my teens one of my dreams was to one day become an author. A world famous author of course. Writing good old fashioned books. Which would be published with my name on them and which people would line up in book stores to buy. New books with that new book smell. I'd sign them and impress the ladies with my wit and prose.

I used bash for a decade or so before I discovered this little highly useful gem a few years back. Nowadays I can't remember what I used to do without it.

From the bash manual page:

CDPATH

The search path for the cd command.  This is  a  colon-separated
list of directories in which the shell looks for destination
directories specified by the cd command.

A sample value is ".:~:/usr".

I've added the following to my .bashrc:

CDPATH=.:/turnkey:/turnkey/projects:/turnkey/appliances

Now this works: