Making the most of Raid Hiatus

Whilst I am one of my guild's progression raiders, I'm in the unfortunate position of occasionally not being able to attend raids every few months for several weeks at a time due to being-at-University and being-elsewhere schedules - in this case, my hiatus started at the end of June and will culminate in the last week of September. My guild doesn't mind this, as we're active enough that my replacement was ready-to-go the immediate week after my departure. Three months without raiding, though, does leave an incredibly big gap to fill, particularly as it is one of my biggest prides and joys to accomplish.