This probably overlaps the OP a lot, but here is a comprehensive list of how to get points:
For both card-holders and non-cardholders:
25 points per day for Jeopardy question
http://www.sonyrewards.com/en/home/jeopardy/
10 points per day for Wheel Watchers puzzle
http://www.sonyrewards.com/en/home/wof/
10 points per day for Sony TV trivia
http://www.sonyrewards.com/en/home/spt/
10 points +/- once per week for Wheel Watchers flashback trivia
http://www.sonyrewards.com/en/clubs/wof/wof_25th_anniversary/
Points plus purchases
http://www.sonyrewards.com/elements/widgets/points_plus/
Registering Blu-rays with BD live- 100 points each*
http://www.sonyrewards.com/en/clubs/bluray/disc_registration/
Inviting friends
*Note that once you register 10 Blu-rays, the 1,000 points are automatically redeemed for a $10 coupon
Non-cardholders can only redeem full points for any item that costs 10,000 points or more (before Gold/Jackpot discount). This must be a single item, not the total of all items purchased.
Additional points for cardholders:
5x points for Sony purchases (use bonus credit form if not purchasing from Sony Style:
https://www.sonyrewards.com/en/your_account/purchase_credit_form/bonus)
3x points for entertainment purchases
1x points for everything else
Double points for Points Plus purchases
5,000, 10,000, or 20,000 bonus points for signing up for the card
Rewards:
The prices shown on Sony Rewards are typically MSRP (or higher in the cases of MAG and MLB The Show) although "Gold Status" gives you a 10% discount and "Jackpot" or "Platinum" gives you a 15% discount. You get these by answering the trivia questions- 9 for Gold and 12 for Platinum within a month
When ordering products, they typically show up within 5-7 business days and sometimes come without a shipping confirmation. They do also deliver on Saturdays.
If you buy something Sony-related with your card, you can fill out the credit redemption form.
https://www.sonyrewards.com/en/your_account/purchase_credit_form/credit
It says it may take 6-8 weeks, but since the switch to Capital One most people are reporting that it occurs within a week. You can also double-dip by filling out a bonus credit form to get the 5x points (basically taking off 5% of your purchase!). Note that you only need one receipt included with the two forms in the same envelope.
This is currently the only way to get PSN vouchers- buy them at a retailer and then apply for the credit.
Other stuff
Every weekday, you can enter 500 points for the Daily Giveaway. Your points are returned around 2:30-3:00pm Eastern the next day if you don't win
Verify your SPIN ID every weekday for a chance to win a big prize
https://www.sonyrewards.com/en/clubs/wof/spin_id_verification/
On the second Monday of every month you can enter 1,000 points for the Monthly Dream Prize. Your points are also returned if you don't win (not sure on the exact timing)
Dead offers:
Jeopardy Weekly Tournament- 200 points per week
http://www.sonyrewards.com/en/clubs/jeopardy/game/weekly/
Registering products- 500 points each (I assume it's dead from reports)
Sony Credit Card Holder Discount- many products were reduced 15%-20% for cardholders in October
Let me know if you have any questions, I've become fairly learned in the Sony Rewards process. I signed up in the Spring and got the card in October and I've already gotten Killzone 2, inFamous, LittleBigPlanet, and 3D Dot Game Heroes for free with 4,000+ points left over.