Fill in the services you use, set a password, then bring everything to Clamshell with a short code or a file. Every section is optional.
Your keys are encrypted in this browser with your password. Nothing you type leaves this page unencrypted, and nothing is saved in the browser. "Send to my device" stores only the encrypted file on Clamshell's server, for 15 minutes, and deletes it as soon as your device picks it up.