Restocking is how I earn a ton of my neopoints,
It's when you buy cheap items from shops and resell them.

Here are some guides that I've used:
http://neonewsnow.com/neopets_guides/restockingtips.htm
http://www.thedailyneopets.com/articles/restocking/
http://www.neopets.com/~xo_BabyCakes

Post some of your own guides, and where you like to restock!

Personally, I restock at the furniture shop. I know that shop backwards and forwards

Books, meds, plushies, and Backgrounds. I deviate to others every now and then.

I used to restock a lot of books but it is harder to restock them now due to competition.

I actually just started rs'ing there.

I restock here and there. I always put my prices a few np lower then listed on Shop Wizard. This allows my items to be purchased more rapidly. It's a good way to get fast np. I like going to the Auction house and bidding on items (many times cheaper than the actual price) and selling them in my shop for original price it's a good profit.

I started rsing at backgrounds.

Now im magic,stamp and anything else i fancy xD

I like to restock in books. It might take longer to fully stock my shop because of competition, but I tend to make a good profit from it.

You guys should restock a lot of books. I made a lot of profit from it...
Also restock gourment food