What can be the best possible way, My favorite method is to using a metal keycard where I marked the phrase buy again it can be stolen 
What your way?
The safest method is to write down your seed phrase on a piece of paper or metallic steel plate and keep it in multiple locations, so that if you lost your hardware wallet, phone or laptop to theft or natural disaster, you can still recover your asset. What your way?
One way to minimize physical theft is to try to keep your financials as lowkey as possible, most especially, crypto. For instance, don't flaunt on social media or to your IRL peers.
A guy got robbed at his home after he was bragging about his crypto wealth while drinking in a bar with his friends. They robbers came well prepared with their crypto wallet for him to transfer all his crypto funds. He was lucky they didn't kill him because he didn't have up to the amount he claimed he had. We should learn to be very discreet with our investment to avoid attracting unnecessary attention to ourselves.