How will my hair grow fast?
Trim it regularly, of course, to get rid of split ends. Use a deep conditioning treatment abot once every two weeks (I LOVE Redkin silk fuel treatments. You can get them at salons and Ulta) Eat lots of protein to keep it healthy and shiny (it keeps your nails healthy too). Sorry, but there's no miracle to make it grow overnight. I heard hair grows half a millimeter every day.
Keeping it healthy (regular washing, regular trims, etc.)
keeping it washed and clean it will grow