Been a while since I got to a thousand but whenever I acrue a backlog of hundreds of reviews i tackle it like this now: use the reorder script to sort by level, do 1 review a day minimum (keep the streak going no matter what) and 100-150 reviews per day maximum. Obviously do lessons only once you can 0 your reviews for a couple of days in a row.
For me it’s my work that’s keeping me busy and exhausted which gave me a lovely review queue of almost 400 items but stress is beginning to ease up again and I’m slowly chipping away at the pile
108 items to ring out the last sparks of my Pleasant mentality, and to ring in acceptance of Pain. If all goes well, I should be hitting LV13 in just a few days.