The Motley Fool - www.fool.co.uk
A great site for anything relating to personal finance aimed mostly at educating those with little or no knowledge. Very active bulletin boards including one for investing for children.
Craigslist - www.craigslist.org
What dad doesn't enjoy scouring the classifieds for that essential bargain? Craigslist is the daddy of classified sites and becoming more popular in the UK.
Auto Trader - www.autotrader.co.uk
Whether you're buying a car or not, it's surprising how time flies when visiting this site. Source of jealousy for countless wives and girlfriends.
BBC - www.bbc.co.uk
You don't need me to introduce you to the BBC but it's still one of the best for most subjects you can think of.