*If it sounds too good to be true, then it probably is (a scam)*. If an ad says make $500 in the next 10 minutes, then you should run a mile! There are many of these about, which involve gambling or sports betting - these don't work!
1. Paid Surveys
In my experience these are a waste of time, as you get paid next to nothing. Before you join they promise loads of money. Once you have joined you get paid $0.50 - $2.00 per survey. Some companies don't even pay you; they enter your name into a lucky draw for a prize. Don't even waste your time! (or money)
2. Photo Directories
These don't pay well either and they are very fussy about the quality of your photos (photo files). It is very difficult for the average person to make good money from this. If you are an amateur or professional photographer with good experience and can submit 100s or 1000s of pictures, then this may work for you.
3. Paid Autosurf Programs
Most are a ponzi or pyramid scheme (last one in looses). You pay an amount to have your website advertised. Once joined, you must look through about 40 adds (automated). At the end of the term you are given back your money at a high interest rate. There are one or two reputable websites out there. You must just do good investigating before joining.
4. Forex Trading
Unfortunately I don't have a clue about this. Many have made loads of money here, but I am sure there are those who have lost too!
5. Ebay
Ebay is one of the most popular sites on the web. A lot of money can be made on Ebay. You need to purchase cheap (wholesale) stock and sell it on, at a profit. This is hard work, as you need to keep, package and post stock. Stuff also goes missing in the post.
6. Affiliate Marketing
This is by far the best option, as you don't have to pay to join an affiliate program. You don't need to keep stock or send any items in the post. The only risks are your advertising costs to promote your website or affiliate link. This risk can also be eliminated by getting free traffic to your website (click on the link below and I'll show you how).