Spark plugs is a common one. I exceed the OE spec interval, but I also install longer-lasting plugs, too. Especially when the job is difficult (transverse V6, 4th gen F-body, etc)
Cabin filters I typically only do every other year instead of every year. Air filters are also usually not replaced as frequently as the manual says to do.
Timing belts on a non-interference engine
I'm usually the final owner of any car I buy, mostly older high-mileage cars. They typically get one set of spark plugs and one coolant change. The car will rust before those services are needed again.
If I had a newer Toyota with the 2GR-FKS, I'd stretch the 60k spark plug interval to 100k