The lesson I've learnt (after riding MAK from 89c to 2.95 and back to 53c and TCM from 23c to $1.20 back to 23c withourt selling any of either) is to put greed and expectation aside and take profits.
Have already started applying the lesson by exiting 50% of my WPL (at $55 - 6 bagger over 6-7 years), WSA (at $9 - 80% profit in 12 months) and CBA (at $45 - held for 8-9 years so still well in front) as well as flicking SUN at $12 (a small profit over 10 years) and MQG (55% loss which would be worse now if I held on) entirely.