my advise to you is to experiment.
This is where I stumbled across my most important techniques. by experimenting.
if your not going to master it, place a limiter on the master bus and push the living dog snot out of it.
push it in the red. then listen to it. learn from dynamic levels and the sounds they produce.
it also depends on what kind of music your producing.
Typically I will send an artist home with a rough copy to listen, just to listen for mistakes, tonal characteristics
(Just something to listen before mastering) and I almost always mix those hot / in the red.
ive had bands tell me they want that sound (typically its only Rock / metal)
but what it is, the levels begin to slightly distort, a limiter on the master bus pushes the dynamics closer together.
thus retaining more dynamics than a master mix would.
However they happier once they hear the master

ive accomplished great mixes without mastering, but ive created better ones with mastering.
make sense ?