The first and most important thing you need to take care of is nutrition.
Hair is made out of keratin, which is why a sufficient protein intake is necessary for hair to grow properly in the first place. Vitamins take care of the strength of your hair, without them hair often thins out or falls out, particularly vitamins B, C and D, and iron. you can find supplements intended for hair care that will include all of them, you dont need to take it all separately
Get a gentle shampoo, I've heard nettle shampoo works great for regrowing, and its not harsh on the scalp.
a good conditioner can help too, especially with texture
Massage your scalp gently to increase the blood flow in your scalp.
There are different oils you can use to help with growth and strength, but this heavily depend on your type. i use castor oil myself but I've heard it can be pretty harsh on thinner, straight, or weaker hair, so that part i will leave to you to figure out. find out your type and search for people with the same type and get their recommendations.
This is completely optional, but I'll include it, if your hair is straight, braiding it before bed (not too tight, better to not do it than to keep it too tight) can keep it from damaging of you toss and turn in bed a lot. if your hair is more curly, a bonnet, or any sort of hair covering can help. other option is getting silk or satin pillow covers
and as insignificant as it seems, water is important. drinking enough water helps greatly with your overall health, including the health of your hair.