You can write down seeds.

Try to keep your seeds offline. Better safe than sorry. If you have to recover (restore) your wallet, you open up your wallet and tell your wallet that you already have a seed. Type it out. After that, you can create a new password, or can at least try to create a new password. You don't have to remember your old (former) password, generally. There may be exceptions depending on the wallet you're using, maybe. You can export your private keys (PK) for your wallet. You can find your private keys in the menu of your wallet. Normally, a private key is a collection of addresses associated with our account or wallet.

Make Sure Your Wallet Works

Third, send money to your wallet, to your receiving address. Maybe somebody can send you money. You can skip this step if you're confident in what you're doing. But you want to make sure you know how to use your wallet like an independent bank account program. You want to make sure you know what your receiving address is.

Wrong Address?

If somebody sends you money, but to the wrong address, then you may not get the money, like mail sent to the wrong mailing address or email address. For example, my Bitcoin receiving address has been 1JY9EVYaB8SafhK8TvFoqs7vyRzmcRJGyv

Did my Receiving Address Change?

Your wallet may change your receiving address. When you open up you wallet, like I did this weekend, you may see different addresses. So, you may feel that your former address is gone, expired. You can try to send some Bitcoin to your former address to see if it works. For me, it still works. You may see your former addresses in your private keys. That may mean they're still there. If you're reinstalling your wallet, and you recover from your former seed, your wallet may display a new address, but your older addresses may still be there. Your wallet may collect money you may get from your former addresses.