Writing down our seed phrase on a piece of paper is actually the primary method I'm sure all newbie must have been thought when they got into Bitcoin newly. So in regards to the question you just ask, I will love to say that the best way to keep our seed phrase safe is by writing it in either ascending order or descending order (i.e in whichever way you may want to) without any incryption such as;
1. My Trust Wallet Seed Phrase
2. Electrum Seed Phrase
3. Ledger Nano X Private key, e.t.c,
Because one big mistake many people make is writing down the name of the wallet that the seed phrase becomes to, and as such making it very easy for anybody to have access to your fund automatically. But if we can write just only the 11 Seed phrase without a clue which wallet it becomes to, it will be very hard for anyone to have access to it very quickly.