Avoid magic, hard-coded text in your programs.
It's another "I never thought of that" moment for me. In today's
Weblogs, John O'Conner
Applying the lesson of magic numbers. You are taught early to
eliminate magic numbers so that cost = time * rate + parts +25 becomes cost = time * rate + parts +SHOP_FEE. Now it is more clear what the 25 represented and the
value can be changed...