The late and great Sheldon Brown for a wealth of cycling knowledge.
mtbr.com is a good place for checking out cycle light reviews as they normally include video and lots of photos. Remember though that photos are only good for comparison if taken using same camera settings, so best to only compare images on the same site.
candlepower forums is another good one for cycle lights, but a little less formal than mtbr.
When searching the internet for anything SQL Server related I normally land on Pinal Dave – his blog is very, very good.
For Oracle DB it’s normally Burleson Consulting.
For Hex codes, HTML codes, etc, I normally look at www.LookupTables.com.
Share your favourite too please…