Here you will find great links for your chosen sports: weather conditions, swell and snow reports, useful information, trip ideas, great forums, interesting blogs and reading not to miss out on. It's all here.
Snow
Ski Touring/Ski Mountaineering; Skiing and Snowboarding; Cross Country Ski
Bike
Downhill/Cross Country; Road Bike/Cycle Touring
Water
Surfing; Kitesurfing; Kayak/Canoe; Windsurfing; Rafting; Snorkel/Scuba Diving; Sailing
Rock + Ice
Ice Climbing; Climbing/Bouldering; Mountaineering
Walk + Hike
Aerial
More Adventures
Caving/Potholing; Adventure Racing
General Adventures and Outdoors Links
A good link takes you to some great places