I think you're already there, my friend.
Excel functions are the building blocks used to construct a desired result.
No exhaustive list would ever be exhaustive enough and still be usable. Yes,
there are some general types of formulas, but so many times the users need
them tweaked in very particular ways.
Here's what I'd recommend:
1)Whenever you have time, scan the Excel Function help sections. Not to
memorize all the functions, but to learn what they are capable of doing.
Many times, just knowing something is possible helps shape your solution.
2)When stuck...Google for an answer. You'll be amazed at how many hits there
are for some searches. For instance, I just searched for "convert text to
numbers" and got 2,250 hits.
3)If you don't find what you're looking for...Post a question. Make sure
you post what you're starting with (structure, sample data, etc), what you
want to achieve, AND what you've tried that didn't work. THEN...give us at
least a few hours to see what we can do for you. (Remember: We don't work
for Microsoft...We just enjoy helping)
4)Build yourself a "formula stash" of formulas you've used and good ideas
that you forsee yourself using.
I hope that helps.
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Regards,
Ron (XL2003, Win XP)
Microsoft MVP (Excel)