5. Avoid listening and reading wrong informations from Bitcoin haters.
In addition to all that has been mentioned by OP, you should also be positive about your investment yielding good profit someday. Don't panic if the price dumps because it will pump again. Also be positive that you will grow in the forum and give yourself more time to learn and make research on your own. Bitcoin investment is like a new born child that takes time before he/she becomes a toddler. Having the market analysis knowledge will keep you stronger in holding for long.