Hacks #60-80
Formulas and functions provide the logic that powers spreadsheets.
Managing programming logic is always a challenge, but keeping track
of programming logic across multiple cells, sheets, and workbooks can
be particularly difficult, especially as spreadsheets grow and are
reused. What's more, the formula and function
capabilities built into Excel might not always be what you want,
further complicating the situation. Fortunately, there are a lot of
ways you can keep your formulas and functions sane.