Bringing over your follows (who you follow) between servers. Do this on the web.
This works between Mastodon servers and even between Mastodon and Calckey.
On Mastodon, go to "Import and Export" and choose "Data Export"
As shown in this screenshot go to the 'CSV' link next to "Follows" and click it to download a CSV file (which can be opened and viewed in Microsoft Excel or a similar program).