electric water pump electrical and electric fan wiring

[5150coupe]

just wonder if any knows how to properly setup the electrical for an electric water pump. ground is easy, but where should i connect the hot wire? the hot wire is currently connect to the switch that is next to the ignition, but this may be affecting my starter. is there any other location where i can get power only when the car is running. otherwise i'm going to just setup a switch to turn on and off manually. i had to go the manual switch route with my taurus 3.8 fan as well since it pulls so many amps at startup. the fan really affected my starter since it was also connected to the switch by the ignition for a short time. i anyone has a resolution for the fan that would be very helpful as well since i don't really like having to remember to turn it on all of the time. any ideas?