Phil has attended:
Excel Advanced course
Microsoft Excel
Once you've completed Microsoft Excel Advance training what's the next step for learning (as there is clearly still huge amounts of Excel that are unused...)
RE: Microsoft Excel
Practise Practise Practise.
Once you have learnt the main features of Excel in the classroom, you really need to put it into a work environment where a solution is needed.
I use Excel for pretty much everything and I have learnt the ins and outs through practise.