To add a Seller to ‘My Favorites’– Go to Item Page and click on 'Add Seller to Favorites'.

To add a Category to ‘My Favorites’– Go to Category Index and click on 'Add to My Favorite Categories'. Also, you can add the same from 'Favorites > Favorites Categories'.

To add a Store to ‘My Favorites’- Go to the store and click on 'Add to My Favorite Stores'.

You have the facility to delete, if it is no more your favorite one.

According to your wish, you can sort it and shuffle using move up and move down.