Clothing and Gear:
Warm Weather Hiking Packing List (Day Hike)
Winter Hiking Packing List (Day Hike)
A Detailed Look at Hiking Layers
Forums/Groups:
Meetup.com has numerous groups for hiking in the White Mountains. Each one is unique and you may join multiple groups to have a better chance of seeing a hike you want planned.
My hiking group: Northeast Peak Baggers
Two forums that are great places to get honest advice, become inspired, and share your hiking adventures!
There are also many groups on Facebook:
The 4,000 Footer Club-Climbing and Hiking in New Hampshire
Hike New England’s Fifty Finest
Bearfoot’s Hiking Gear Flea Market
Plus you can find Trail to Summit on Facebook!
Courses/Preparation:
SOLO Wilderness First Aid (plus other courses)