stock - stick with the scheduled maintenance.
boosted - also be mindful of and periodically check for fluid leaks and loose parts and heat management (assuming built & tuned correctly)

Depends on what you mean by "special." There's more stuff to check and everything needs to be checked/serviced more often ... but nothing all that special. Things will break more often - you're putting more stress on the drivetrain - but it's the same things that break with a "normal" engine, they just break more often.

A properly engineered and installed system that doesn't push itself or the engine to the limits can be very reliable, but it takes some effort to keep it running right.

Change oil 4k miles, check ground when pulling out of parking for oil, check oil level about every 2 weeks or before I plan to go pedal smashing, check under car whenever I get it up for any maintenance. Also wash car when dirty. Got to keep her clean.

I'm trying to add keeping engine bay clean to the list. Clean bay will make it easier to look over things and find problems faster such as oil leak or whatever.

YzGyz