Turning your home into holiday accomodation

http://www.bedandfed.co.uk/ helps you convert your home into a b and b  by advertising any spare rooms you have plus breakast.

You mustn't charge more than £35 per night.
costs £70 to advertising every year

crashpadder.com

selling your own designed clothes

http://www.spreadshirt.co.uk/ helps you create and sell your own designed t-shirts,sweatshirts etc etc

zazzle in another post

Human intelligence tasks(HITS) and innocentive

HITS are little jobs that a person can do better than a computer.eg descriding a photo etc

http://www.mturk.com/ ownedd by amazon is the place to visit

http://www.innocentive.com/
offers cash rewards for solving problems for businesses and charities etc
Successfull ideas could earn up to $1million

site-flipping

This is where you buy a website,develope it by giving the website a better look,adding forums and other features and then sell them for a profit.

Websites like http://flippa.com/ give more details.

selling your own cds and dvds

You can sell  cds and dvds created by yourselves as well as calenders on http://www.lulu.com/

selling advertising space on one's websites

http://www.projectwonderful.com/
advertisers bid to appear on a spot on your website.

 Perhaps off topic, I have had an unusual idea for an advertising website.

paid for answering questions

www.mahalo.com/answers
If you answer a question posted there,you get paid what the person thinks your answer is worth.

selling paintings and art on internet

http://en.easyart.com/
pay one -off  fee to list artwork and photographs

paid to do surveys

sign up at

http://www.opinionbar.com/
http://www.yougov.com/