Here is a list of many great links that I use all the time.

Dance

NDCA The National Professional Organization of Ballroom Dance Teachers. Check our their site for the list of all the professional competitions happening in the US.
UWMBDA The local college social ballroom dance group.
Dance Vision One of the bigger places in the US to order videos from.

Programming

OS News Not just news about OS but current software happenings.
Freshmeat Listings of new version releases of public domain software, great place to get ideas from.

Shopping

Tiger Direct Great place to buy computer stuff, and they almost always get it to my door within a day.
Amazon I love books. I really love Amazon for being able to read parts on-line, and having a wish-list feature.