My biggest mistake was believing everyone wanted to best for themselves. Most models just want to get by. Often times, in this industry you will meet people who you really want to help. They will take your help but it keeps them from being self motivated. It can have a damaging effect on both of you. If you see someone in need offer to listen but do not give them money for nothing. There is in general no reason most models cant get on webcam and make the money they need other then sheer laziness and poor spending habits. They will feel entitled to your help and resent you for it all the while.
The best way to help someone is offer them work. Set up double skype shows, or book custom videos etc but never give them the money for nothing. You will get take advantage of by everyone if you are naive.