Heat acclimation
Train in the heat before a hot race. The sauna afterwards won't do the same job.
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Steam room
Use the steam room to relax. Take the health claims to the dry sauna.
Finnish dry sauna
Sauna 4 to 7 times a week and stay in past 19 minutes, or it barely counts.
Uberman / Everyman polyphasic schedules
Sleep the night in one block. Drop the nap schedule.
NSDR / yoga nidra
Run it free off your phone. Don't buy the app, don't drop real treatment.
The short 'power nap'
Nap 10 minutes, not 30. Set the alarm before you lie down.
Active cooling mattress pads
Cool the room first. Nobody's tested the pad against an open window.
Mattress selection
Buy medium-firm, buy it returnable, and stop paying for anything above that.
White / pink noise masking
Skip the noise machine unless something outside is actually waking you.