What do you drink?
sgoraya: Ten Ren Green Tea Powder.Its good, healthy and easy.  A small spoon of it in my water bottle, a good shake and its done.  Its good hot too.As an aside, my wife noticed how my fingernails started growing faster after my green tea habit - really! ;)  
It prompted a google search several months back and indeed, it does help with nail growth among its many other healthy benefits.