Anthony's Law of Force: Don't force it, get a larger hammer.
Any given program, once running, is obsolete.
If a program is useful, it will have to be changed.
If a program is useless, it will have to be documented.
A Smith and Wesson beats four aces.
You can lead a horse to water, but if you can get him to float on his back you've got something.
If at first you don't succeed, transform your data set.
How sharper than a serpent's tooth it is to have a thankless hound.
Then rested he by the tumtum tree, and stood awhile in thought.
And as in uffish thought he stood....
Westheimer's Time Estimation Rule: Estimate the time you think it should take, multiply by 2, add 3, and change the unit of measure to the next higher unit.