Pro tip 1: If you're changing your Lightning address away from Wallet of Satoshi, you may want to add the relay wss://nostr.mutinywallet.com prior to updating your profile. This relay will blast your profile changes to most relays ensuring that your changes are seen by most users across Nostr. Otherwise, relays you don't use any longer may be left with your old profile data, Lightning address and will not be aware of your changes. This means you'll still receive Zaps to your old WoS address.

Pro tip 2: As for everyone else, it may be a good idea to nuke your app cache or local app storage today or tomorrow so that you aren't using old cached versions of people's profiles. Some clients have issues with this, but not all will.