(a) Remember that whenever market is making new highs than one has to be ready to see a fall.
(b) It is to be remembered that when market makes a new low and if there is no external Factor, than it will rise.
(c) One should not become impatient when the market falls as it gives an opportunity to buy stocks at sale.
(d) Do not become euphoric when mkt rises as the thing which has risen has to fall as per the Newtons Law of motion.
(e) Remember that one can make money both ways i.e. during the bull mkt as well as bear market.