I don't have the luxury of hardware wallets or paper wallets, anything more complicated than an offline wallet. I'm a simple man, using the Electrum wallet. Your safest bet would be to type your seed phrase on a small piece of paper and tape on the bottom side of a drawer. Create one or two copies and recreate the same hiding pattern, and you'll be good to go.
What do you say storing the seed phrase on bank safety deposit box?
The bottom of a simple drawer will suffice, use your bedside table, a kitchen drawer or your desk, you'll be fine. I highly doubt it that someone will ever find it hidden there, and actually acknowledge that it's a seed phrase that belongs to a cryptocurrency wallet.
At least, that'll suffice for the average joe, who isn't holding tremendous amounts of Bitcoin, in that case it's better to resort to safer storage methods.