There are lot's of good advice already but I'd like to add few more. You need to make a mind shift from dev/manager role to strategic senior manager. My recommendation is to read: Good to Great ( http://www.goodreads.com/book/show/76865.Good_to_Great ) On War ( https://www.goodreads.com/book/show/117031.On_War_Indexed_Ed... ( I'm not sure which English translation is the best )

and try to see how practical tips both give for decision making. Art of War is also good, but I'd prefer Clausewitz since it's much more straightforward.

And read this masterpiece http://www.ikea.com/ms/en_US/pdf/reports-downloads/the-testa...