While some women can go for what seems like years without trimming their ends, chances are that woman is not you. One of the biggest hair care mistakes you can make is not trimming your ends when they look crazy. It's one thing to put it off for a week or two, but months? No, you are only fooling yourself. Raggedy ends do not look good and what's worse is that the damage just continues up the hair shaft and when you finally do trim, you will be losing much more length.