Always take the line from the front of the dispenser, never the side.
Wind line firmly and evenly onto the spool, spreading the line with your fingers to give a smooth casting base.
Never stretch a nylon monofilament onto a spool; when it goes back to its original length it will exert strong enough crushing action to damage your spool.
Never allow loose coils to develop on your spool through careless uneven winding.
Adopt the habit of applying light finger tension when retrieving line and spread evenly over its bed.