as a default while playing rest your fingers on the qwerty keys for map control:
Hit Q to see the pretty terrain map mode
Hit W to see the most useful political map mode
Hit E to see trade map mode (Set up your trade strategy!)
Hit R to see diplomatic map mode
Hit T to see the religious situation (You should keep those missionaries working whenever you are ready to handle rebellions!)
With armies:
D to detach a siege contingent
S to split the army in half
G to combine all selected armies
Super Convenient Production:
V to build troops and ships
B to build province upgrades
These are the ones I find myself using every 5 seconds^
Hit Q to see the pretty terrain map mode
Hit W to see the most useful political map mode
Hit E to see trade map mode (Set up your trade strategy!)
Hit R to see diplomatic map mode
Hit T to see the religious situation (You should keep those missionaries working whenever you are ready to handle rebellions!)
With armies:
D to detach a siege contingent
S to split the army in half
G to combine all selected armies
Super Convenient Production:
V to build troops and ships
B to build province upgrades
These are the ones I find myself using every 5 seconds^