The different conditioners on the market, in spite of what they say, don't actually, repair your hair. They make your hair *feel* less dry and more silky. It's all a matter of which one feels better to you.
Your hair is actually dead. No blood vessels are in the shaft of the individual hairs, thus the hairs get no nutrients. Taking vitamins and drinking lots of water only helps the hair that will grow out.
Now, having said that, I must admit that I have long hair. What I've used successfully so far on my hair is coconut oil - I put it on right after I shower, on wet hair and I braid my hair (no blow drying or anything like that). My hair is pretty healthy now, but I had to cut it pretty short once I realized how damaged the very ends were. I usually do the bathroom haircuts myself, just pull everything to the front and try to do it even. Works ok. Can't really tell on my hair since it's all the way down my back. I also use hot olive oil treatments (heat up the oil, put it on my scalp and cover with a shower cap and a towel for as long as I can stand it - hours sometimes).
Since I have psoriasis, I use pretty harsh shampoos and I wash my hair every day. If I didn't have that, I'd wash my hair every other day, or even longer. Washing is pretty hard on the hair. I use any conditioner I find on sale. Cheap ones work fine for me since I only need them to make sure I can comb my hair. Oh yeah, I don't brush, I use a wide tooth comb. I try to protect my hair as much as I can so I minimize brushing and I minimize anything else that may be too harsh. I only use soft scrunchies, or the 'ouchless' rubber bands with no metal clasps. I love those plastic clips, but I usually have to get a really big one.
I've seen recommendations for women with long hair to sleep on a satin pilow to minimize friction and save your hair, but I never spent the money on a good pillow. I just loosely braid my hair in two braids before bedtime and I sleep fine and my hair isn't so tangled.
And that's about it. I hope this helps.
~serena