Optimizing router config for very high latency (e.g., satellite) links?

The real limitation is the speed of light, so I understand RTT will never be less than about 500ms in ideal circumstances. What router tuning have you done to get the most out of satellite?

I found rfc2488, but that seems to focus more on specific TCP tuning that would be done on the sender/receiver, not routers (correct me if I'm wrong). It's also from 1999.

Any current best practices, beyond the usual QoS toolchain, specific to high-latency / high-BDP links?