If you create or generate unique email addresses for different services, what's your preferred approach?

I have been wanting to set this up for a while and I'm curious what others' experiences have been so far.

For those wondering, here is an incomplete list of available services:

- FastMail + 1Password https://support.1password.com/fastmail/

- SimpleLogin https://simplelogin.io/ (bought by Proton)

- Proton Mail https://proton.me/blog/proton-pass-launch

- DuckDuckGo Email Protection https://duckduckgo.com/email/

- Firefox Relay https://relay.firefox.com/