There are lot of them and they aren't bad. Moreover, I like to recall them and repeat them to other traders. However, such phrases as "you should have a plan". "you should learn to control your emotions", "you need to learn before to trade", "you should keep calm and trade, never fall in greed" and many others are just cliche, as that's easy to say "don't be so", but that's really hard to overcome such things. This is not things that people gain, that's each person nature and you cannot just say "be calm and don't care about losses", but that doen't help person to keep calm. So these phrases are usefull, but they are commonly-used and cliche.