My investment approach: "Rule No. 1: Never lose money; Rule No. 2: Don't forget Rule 1" - Warren Buffett.
Staying true to the two rules set by the famous man himself!
Just selecting companies with good fundamentals and staying with them for the long term. As long as the company keeps making money, I'm making money too. Not bothered by the entry price unless it's extremely overvalued because I have 30 years investment horizon. I will only sell when the company shows signs of not being able to make money. Investment should be kept simple.