Almost 2 years ago I posted in this thread and have more to add to mistakes I have made with my natural hair...
1. Using too much heat - once I learned how to get my hair super straight with heat, I was somewhat addicted to it. I would blowdry and flatiron with grease and it kept my hair straight for a month. However, it caused a lot of split ends
2. Not moisturizing enough or properly - I like wearing stretched out hair styles on dry hair. In order to do that, I couldn't moisturize much or else my style would shrink. However, not moisturizing caused my hair to get too dry and break off at the ends without me realizing it sometimes, hence the reason I've been APL for almost a couple of years.
3. Dry combing - again, this was done to achieve stretched out styles. This also caused breakage and splits.
4. Trimming too much - there were some times when I definitely needed a trim (when I had split ends), but there were times I didn't need to trim. There was also a time back in 2008 where I asked for a trim and the stylist actually gave me a cut from APL to shoulder length.
Now, I've been trying to reach my goal of at least BSL by the end of this year. I have seen time and time again that moisture and avoiding rough manipulation is the key to retaining hair length. So I've been keeping my hair in a bun and juicin' my hair with S-Curl, my long lost hair friend back when I had a TWA.