Threads that contain good general introductory answers.

"Various questions." Especially the thorough answer from Familygrokumentarian.

"Can someone please help a confused paleo newbie?" Especially the thorough answer from Sherpamelissa.

"Paleo do's and dont's." Especially the thorough answer from Gilliebean.

"Just the beginning." Especially the thorough answer from Stephen-Aegis.

"Complete and utter newb." (Advice for autoimmune disease.)

Here is a list of paleo blogs:

"Good paleo blogs?"

These are good posts on Paleo books:

"Books to read beyond Paleo Solution?"

"Does anyone know any good paleo books to read?"

Threads of weight loss tips with lots of great responses:

"Any paleos out there actively trying to lose weight? Tips?"

"The Female Experience: Paleo and weight loss."

"Beginner and hungry all the time?"

"Help with weight loss?"

Stephen-Aegis on leaning out: "What paleo foods should I avoid while leaning out."

Lunch ideas:

"Quick meals that can be transported."

"Paleo beach food?"

"Anyone got some good ideas for packed lunches?"

"So what can I eat for lunch in a pinch?"

"Ideas for bag lunches? What do paleos eat at work?"

On restaurants and eating out, and the difficulties of eating paleo among non-paleos:

"List of paleo-ish options at chain restaurants?"

"When you are eating out?"

"Have you tried the Ghetto Burrito Bowl? (Chipotle menu hack)"

"Paleo at home, vegan when dining out?"

And here and here are two good answers from Jae on strategy in non-optimal eating situations.

Also search for individual cities with the city name or with the "restaurant" tag.

Babies and Pregnancy:

"Introducing solid foods."

"Does a fetus want mommy to eat carbs?"

"Is it wrong to ignore the requests of a pregnant wife?"

"Do you make special requests of people bringing you food for support (as in illness, new baby, etc.)?"

Life raising paleo kids:

"Halloween and paleo kids."

"Paleo for overweight kids."

"For those with underage children at home: do they paleo too?"

"Kids need carbs for motor skills development?"

Food sourcing and conventional vs. grass-fed proteins:

"Best paleo foodstuffs on Amazon?"

"Is it OK to eat plenty of fat from conventionally raised ruminants?"

"Should I eat the skin on my whole roasted chicken or chicken legs?"

"Is conventionally grown meat really that toxic?"

"What brand of pastured butter do you fancy?"

"Grass-fed lamb?"

Practical Applications to Everyday Life:

Eating paleo for less:

"Best strategies on a budget."

"Have you ever had to downgrade the quality of your food due to sudden budget constraints? How did you do it?"

List of acceptable food, and how to apply exceptions:

"General list of acceptable food?"

"Do you embrace 80/20, 90/10, 99/01 people? Or do you frown upon them?"

Ways to make the transition to paleo eating easier:

"Are there ways to make the transition to paleo easier?"

"Easing into paleo? I can't survive a strict 100% paleo. How to get started?"

"'Low-Carb Flu.' What was your experience?"

Menu planning, including threads for vegetarian options and allergen options:

"Ultimate paleo menu."

"Paleo make-ahead meals."

"Guess who's coming to dinner? Vegetarian-paleo dinner menu needed!"

"Do you have a daily menu?"

"Can a family with egg, peanut/tree nut, and fish allergies live a paleo lifestyle? Hack their theoretical menu!"

Common and not-so-common acronyms, abbreviations, and other confusing terminology:

"What are all of these paleo-related acronyms and terminologies?"

If you don't find the acronym or term that you're looking for, just post your question as an answer to that thread -- you'll probably get a response (in the comments to your answer) within an hour.

I think this thread is good for newbies.