Speeding up Nexus 7 (2012)

Any tips on how to speed up and improve the performance of my Nexus 7 (2012)? Ever since updating to Lollipop, I have noticed increased lag and overall bad performance. I performed a factory reset and cleared everything last night in order to start fresh. I also cleared the cache. A little better but still lagging a good bit. I ended up rooting it again bc its pretty boring without root access. Any other ideas/tips.