(s)cale
(e)xtrude
(r)otate (you can enter a number for exact degree rotation, same for scaling by numbers)
(g)rab
(delete)
(b)ox select
(a)ll select
(f)- make (f)aces or connect edges
ctrl - snap
space- add
try using those for basic modeling tools
tapping x, y, or z when rotating, scaling, or grabbing allows you to lock to that axis. you DONT hold s, r, or g to manipulate the object, just tap it once. hold ctrl snaps the object when manipulating it. (its actually called transforming it)