The way I do it is as soon as I write down the Seed, I close the Wallet, then re launch it and use the Restore option. Enter the Seed from the paper I just wrote and go from there.
this is a good method. but you should first complete the wallet creation and note down the wallet address too. then you can repeat the process to verify the seed. because sometimes even you enter a different word (with a similarity) in the wallet, it'll still open a wallet but then the address will be new. that's why it is always good to note down the address too.