What are your favourite investing rules?!

Every good investor has his own set of rules and principles. Share your favourites here!

 

Never take a profit.

 

Always take a profit at loss
=P Kiddin'

 

Unlearn everything that you have learnt.

 

Already done :

http://www.elitetrader.com/et/index.php?threads/the-best-trading-proverbs.284308/

Or are you making a bright distinction between investing and trading?

 

What if you unlearn how to unlearn ?
You may have to backup this one.
Well ... You can still learn it.
Don't unlearn to learn.

 

Never trade unless you are well rested and feeling pretty well overall. Most jobs pay you for showing up while trading usually penalizes you for showing up when you are not tip top.

 

The moment you hope, get out and think afterwards.

 

Cash is a position.

 

Do onto others before they do onto me.
Day trading= Always take profits.
Long Term= At the end --reverse.