Of course you need to open up the mail to be sure they gave each family member the right number of miles!
Keep track of those bonus miles, too.
I don't know if any airlines still do this but at one time if you were not a member of United's Mileage Plus, they would not let you select seats until about 30 days in advance. Or was it 24 hours in advance?
You don't need to get out the electric paper shredder for the kids' credit card app's, just tear them in four pieces. The ones trying to sell the kids life insurance, you can just toss them in the trash whole.