Go to SUBMISSIONS MAIN, read some Submissions (choosing by title and/or tags) - or go to TAGS MAIN and choose Submissionsby their Tags - then choose [+] ADD Submission to Favorites near the bottom of the Submission.
Add some favorite Tags!
Go to TAGS MAIN, choose Tags and [+] ADD Tag to Favorites from the individual Tag page.!
Or go to SUBMISSIONS MAIN, read some Submissions, following their Tags toward the bottom of the page. [+] ADD Tag to Favorites from the individual Tag page.