Create a practice doll and equip a shaft. Then beat it senseless for a bit, keeping its damage below 20 at all times. Never, EVER use a true weapon, especially a sword, on a practice doll. It's a complete waste of a good weapon and destroys the practice doll in no time. Not recommended.
===Dangerous (but a heck of alot more fun) Way===
Go hunting. That's it. Just go hunting. You first want to try hunting down simple farm animals such as pigs, pheasants, roosters, bulls, cows, etc. Even wild cats work at the start. At around 10 fighting you want to get some leg protection and hunt down wolves. The wolves aim for the legs alot, so leg protection will save you health in the end.