-Ask to a famous poeple to invest hisself with the cause and give his image for it.If people are kind of him o just admire him, they would like to participate to the cause and give money.
-Thanks to the Internet u can creat an add with less money than to the Tv for example.So the public cause can make some add and send them on the web to touch many persons and to make aware people who don't know the cause.
or teasing!
-If your business already exist in order to earn money you can creat a network and employed people who work for you on the internet.Their aim will be to sell some things and recrute new poeple to sell the firm's product.So the firm promess them to give all time a part of the turn over that they sell.At the end u earn very much money.
-Today people live througt the Internet.Sometimes they prefer to buy things on than go to a shop.SO if you just have a physical business you can earn money but not so much than if you creat a site on the net.So have a site is become necessary to you.Notice that a site have the biggest turn over than all the other shops you have!thinking!
-Second thing : You go to play on Second live and you spend your all time inside you buy a lot of things(houses,bulding) don't be afraid its a new life which begin to you!
-Third thing : Exist some games on the internet as "world's poker" so you can play online and try to be the better.At the begining u will be a loser so bet little money but after some entrainements you can become a boss and earn money.
-Last thing : If you are very ambicious you creat a business on the net which the aim to help public causes and you play on second life :) !!!be creative