I think that every girl has at least once experienced a bad haircut. Desperately they have been trying several methods to make the hair grow faster, with no luck. Here is what actually works:
Massage the scalp as often as possibly. This increases blood circulation so that your hair follicles receive more of the nutrients they need for optimal hair growth
FAST shampoo and conditioner can make your hair grow 45% faster!
Stand on your head for 1-2 minutes every day. This also increases your blood circulation.
Do not use hair dryers or flattening irons. If you really have to, remember to always use heat protection!
Do not cut your hair... Many hairdressers tells you that you have to cut your hair if you want it to grow optimally, but this only counts if your ends are splitted! A hair cut will always make your hair look healthier and better, but if you want to get longer hair, you really should just suffer through some months with unhealthy hair.
Make sure you eat healthy and get all your nutrients!
If you just can't wait anymore, you can get some hair extensions. It's really expensive, but it may be worth it!
There's absolutely nothing that will make your hair grow like 3 inches during one night. But with patience, doing these things can make a huge different on your hair growth!