Most of today was spent with my head full of spreadsheet.
Was an interesting time - somehow I've never before had to deal with a spreadsheet. So, while I knew roughly how things worked, there was a bit of a learning curve to overcome.
There's definitely some powerful features, but I did long to bring out Matlab or some other sort of interactive environment where I felt I would be faster and more comfortable.
Nonetheless, this process has certainly opened my eyes to the world of spreadsheets!
[Image credit: Craig Chew-Moulding]