You forgot the two most imfamous cliche trading tips of all time and those are
-DYOR (do your own research for those who don't know
)
-Invest what you can afford to lose
Although "Invest what you can afford to lose" may seem cliché, it is one of the wisest recommendations, but at the same time it is one of the most ignored by the sudden enthusiasts who want to get rich overnight. By the way, another of the clichés that I have found in different investment systems (which actually involves legal issues) is something like "past performance is not indicative of future results" (Disclaimer).