Starting at strategy firm in 1 month - what should I learn now?

Hi all,

I'm starting at a small strategy consulting firm as an analyst in a month. I've got just over a year experience working in a client facing digital marketing role, so I have the basic Excel/power-point/organisational skills you would expect.

Does anyone have any recommendations of how what I should learn between now and starting? Specific resources would be great. Could be advanced Excel skills you find yourself using a lot, general reading on business, or specialist resources on strategy consulting.

The company specialises in customer/market strategy, brand and innovation type work.

Thanks!