Press B to get a disguise, Right click to cloak.
Mask is the disguise menu for manual edit/selective edit of current disguise.
Knife is a one hit kill.
Gun is ranged about five hit kill.
Radio box (sapper) takes down engi buildings. Best if planning a rush.
When cloaked you should wait a second before moving out to avoid enemies seeing the smoke Remember to conserve it for it only last about one minute.
When disguised avoid looking like your team trying to do an objective.
Pyros = bad.