Take care of your Mac, and it'll take care of you. Give the fans room to work, and make sure you've got the latest firmware for your Mac. If your fan sounds like it's working harder than it should, don't be afraid to turn the computer off, open it up, and blow out the dust bunnies. Beyond that, if something physical needs to be repaired or replaced, find the appropriate guide online and take your time with the repair.
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