Therefore, there is no way to predict when a slot machine is going to hit, and any strategy or system claiming to do so is likely to be based on superstition rather than fact.

Again, there is no point playing all lines on a machine where you are not comfortable with the total bet per spin. On the multiple line machines, always bet the maximum number of lines linked with the amount you are comfortable with. On reel machines I ALWAYS bet the max, as that play is needed for most jackpots.