Polish your hair. You will lose a few millimeters of the total length and effectively solve the problem for up to six months, then do it again and repeat two or three times a year, in between nourishing your hair with oils and masks
When using an iron or curling iron, spray on hair thermal protection
Nothing. Just shave off and try to avoid them.
After shampooing, lubricate the ends with hair oil. The best is coconut.
Do lamination or keratin restoration of the tips.
As far as I know, hair loses strength and volume with length. The easiest way, in my opinion, is to trim those sections of split hair, so that the hair grows slightly stronger and healthier hair grows. Sometimes it may not help, in this case balms and "healing" shamuni may come, if you are not aware of their names, watch the TV endlessly show them.