To get Spotify presale tickets, you generally need to be one of the top fans of the artist, as determined by your listening data on Spotify. Spotify sends unique presale codes via email to these top fans. To increase your chances:

• Follow the artist on Spotify and listen to their music frequently.
• Make sure you have enabled notifications on Spotify for offers and presale emails in your account settings.
• Check your email around the time the presale starts, as the code is usually sent shortly before tickets go on sale.
• Sometimes Spotify presale codes are also available through associated ticket vendors like Ticketmaster, so sign up for their notifications too.

In short, being an active, engaged listener and enabling Spotify notifications is key to receiving presale codes for Spotify presales. Then use the code received by email to access presale tickets on the ticket vendor's site at the provided time.