Because I needed to port the clisp package onto the armv7hl build of openSUSE I had to work on the package configuration itself and at some point I decided to actually have a look into clisp itself.
What I’ve learned for instance so far, is that mathematical operations (and any other function) can easily be expressed with lists in Polish notation:

[1]> ( + 1 1 )
2

Also the packages of mine can be checked out here, and as soon as it builds cleanly at least for all the platforms and architectures the original one did, I’ll submit it again. For now you can get clisp for openSUSE-12.3 and later armv7hl here: https://build.opensuse.org/project/show?project=home%3Aleviathanch%3Abranches%3Adevel%3Alanguages%3Amisc

Also for relaxation, have a look at the why does the chicken cross the road answers. I especially like Anderson Consulting 😉
http://www.madore.org/~david/misc/chicken.html