I don't do any of the above...
The car is not a DD, and I put about 5k on it every summer. There is really nothing special that I do outside of the OEM recommended things (oil change, filter cleaning, other fluid checks...etc.)
The car (06 350Z with the BP twin scroll kit) now has almost 40, 000 boosted miles. I have never had any issues.
I do check things over every spring before the car hits the road.
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