An affiliate program is a good way to make money especially in the beginning. I said beginning because at that time one does not understand the market and is not good to bring his own product out in right way.
Affiliate programs fill a gap nicely. You have got a readymade product and a readymade webpage too (though you can develop your own and you should be doing that).There is only one aspect left to make that money.
Making sales.
But you need to choose your affiliate program carefully.
The company should offer you a good commission. Check the percentage offered. Good programs offer 50-60% commissions. Some of them even offer 100%. Though high priced products seem quite lucrative due to apparent volume of money in commission but selling a high priced product may not be that easy task too. It is because the market for those may not be that large. So you need to select your product carefully.
One very important factor that is often ignored is your aptitude for the particular product. Select a product that you can associate your interests with. For example if you like gardening then a product that caters the gardening needs will be easier to sell than a selling a real estate product.
Because in sales first of all you need to be convinced about the usability and benefits of the product before you attempt to sell it. If the product is around the area of your interest you can easily identify the beneficial aspects. Then you will find it easier to convince your potential customers.
Study the market and demand for that product.
If the demand is high the sales are easier. To study the demand go to Overture or Google and look for the search made around the keywords of your product. It will give you a fair idea about the demand.
Plan your market strategies beforehand.
It is better if you make your own website instead of promoting the copy of the original page laced with your link. Having your own website gives you a unique identification and professional look. The other advantage is that you can promote multiple products on the same page rather than promoting different pages separately.
Web hosting is quite cheap now a days and webpage can be easily built in front page.
Try and give your full efforts into promoting what you have got. Affiliate programs are good way to learn the market tactics. Learn and try them best to your abilities.
Stick with the product you have chosen instead of jumping to the new offer of some other product. New products are being released everyday but being new does not mean that it is better and easier to sell.
Analyze regularly. Test regularly and keep working.
Your commission graph would definitely rise.