A lot of companies offer referral fees or discounts if you tell your friends and family about their products or services. This can be a great way to save on the things you already buy, or to make a little extra (most pay you with a credit discount, but some do pay with cash or gift cards). The problem is, the offers are scattered and there is no organized way to find the referral opportunities.
This page is a collection of 100 different websites and apps that will pay you to refer your friends. In some cases, you'll need to sign up yourself before you can refer, but others allow you to refer without signing up or making a purchase.
If you have friends and family that can benefit from the products and services you use, you probably already tell them about the things that could help them. Why not get some compensation for those referrals.