Here's a great example of what I wrote about just a few days ago. A new RFC released today, RFC 5375, provides some very practical guidelines on IPv6 address planning. In it, you'll find nine pages of discussion followed by two solid case studies and some additional considerations regarding non-/64 subnets.
- As you might expect, IPv6 address allocation is very similar to IPv4, but without nearly so much emphasis on address space conservation.
- /64 subnets are a good idea, even for point-to-point links.
- /64 subnets are virtually unlimited, so host subnetting isn't nearly as granular as with IPv4.
- Unique Local Addresses (ULAs) introduce a new aspect of address assignment, which allow RFC 1918-like private addressing in parallel to global addresses.
Well worth the read. Also, if you're interested in keeping up on new RFCs as they're released, I recommend subscribing to the dedicated RSS feed.