Back in 2003 when I was still in elementary school, Dave Akins wrote a list of laws to abide when building a spacecraft. I'm not planning to build one of those any time soon, but there seem to be many similarities with web development. A few examples:

Engineering is done with numbers. Analysis without numbers is only an opinion

Design is based on requirements. There’s no justification for designing something one bit “better” than the requirements dictate

Don’t do nuthin’ dumb

Here's a good one te keep next to your desk, and consider yourself lucky next time you ship a bug to production.

Space is a completely unforgiving environment. If you screw up the engineering, somebody dies

Read all 44 laws at their home on spacecraft.ssl.umd.edu.