You really want to earn money from your online job without any investment, then this is the right place where you get better tips. Almost every money making program or website on internet has a referral system by which you can increase your earnings.
Then you have to know that what is referrals, Referrals are one of the best money making opportunities on the internet by generating passive income. You can join programs or websites that have referral programs, and then encourage others to join these programs to earn money online. When someone signs up for a program or website through your referral link, you earn a certain commission for referring that person. You have to keep patience, because getting referrals is not an easy task and is slow process.
This time blogging is very popular online money making technique of posting daily journals in your blog site and making it popular to make money from it. Ad-sense are the another best way through which you can get good income, in this you just have to construct a good role site which can hold up as much as advertisements on it.
Also there is online freelancing sites where you can directly contact providers for on job opportunities. They provide facility of freelancing works with 100% payment guarantees on every small assignment which you do. Most of the freelancing sites are free to join by anyone if you have the caliber to perform the jobs you can simply sign up with it.
Many money earning programs on net are just a scam. They offer and guarantee you for huge perks and payments but they will not. These are just scam sites that will use your money and precious time for promoting themselves and paying nothing. Some of them free and some paid.
Consider hundred times before joining these programs. Some sites ask for little fee for becoming a member on their site and then earn huge. Just beware of these. Join these money making programs and sites carefully.
All the best.. :)