You just need to know where they key ares and memorize the hotkeys.
For example, dawn of war, i play with the imperial guard alot, when i click in the command center at the very beginning i alway type "G G E" and i know that will get me 2 guardsmen squads and an engineseer, when choosing the builder, i know "L" means listening post, "I" infantry command and "T" tactica control.