I do the same things I do during the seasons. Watch pmvs along with other fan made videos, read fanfics, rewatch episodes, go on here, go on equestria daily, buy merchandise, read the official comics, and watch panels. It's pretty easy for me to stay a brony during the episode droughts because of the fan made stuff and because I love the show so much. Despite all of that, though its still extremely hard to wait for season four.