Pay off your house
Live in your own house
Spend within your means
Don't go into debt unless you are willing to lose all the collateral
Don't buy shares with money you cannot afford to lose.
Don't invest in companies that pay their management and directors a salary too many multiples more than what the Prime Minister gets.
If a brokerage is rumoured to be going broke it is.
Avoid fundamental analysts, tip sheets.
Follow the trend.
Always have a stop loss.