if you ever wanted to run away from home its not worth it, it cost money and you have to go back eventhually but if youre doing it to get away for awhile or just purely doing it for attention or thrills. Money, you need money for transportation , food ,or a place to stay, if you have a place to stay like a friend house (why bother why not just tell them you wanted to sleep over) , second saves your phone battery or maybe put it on airplane mode use it only for contacting people , in my case my parent put a tracker on mine lol so i uses my friend's phone. if your parents is the paranoid type ,get in contact with them just so they wont report you for missing. lastly danger , rapist, pickpockets, scammer, etc: know how to protect urself. (do some research about the places you were going and you'll know your way ) save money ,you cant afford to entertain urself on your way.
