One of the most important things to being efficient in an RTS is learning the key-binds. However, I don't see a list of key-binds in Natural Selection 2. What are they? Does it differ for alien/marines?
The commander hotkeys are laid out in a grid system based on their position in the UI. The top row (of tabs) are assigned QWER. The two rows of icons below the tabs use ASDF and ZXCV.
Space will take you to the location of the last alert (i.e. structures under attack, marine requesting ammo, etc).
You can select a group of buildings or units and press Ctrl+1-Ctrl+5 to save the group, and 1-5 to reselect that group later.