Another thing worth doing is to start throwing down wards at key locations: buffs, jungle entrances, river brush between lanes, etc. It'll slow down your build a little bit, but nothing is better than map awareness. I've gotten a healthy amount of kills by catching people in transition, where it's extremely difficult to get away from Akali.
Also worth noting: get good at tower-diving, because it creates kill opportunities for you. Akali is better at it than most, due to her ultimate and innately high burst damage. If you're jungling with her anyway, you can probably take an extra tower hit just from the extra Armor that you are packing. One of my favorite things to do, when my teammates have pushed their opponents into lowish health under an enemy tower, is to Shadow Dance in from out of sight (with Flash, if necessary), finish them off, and GTFO. Sheen was made for these kind of shenanigans, if you can afford it early enough.