Some agencies require about 25 dives before annointing you advanced (in addition to skills checks and written tests). Since 10-15 of those will be from the OW and AOW dives, there's only another 10-15 independent dives to log. You're about there. More dives are better, I think, but I earned AOW with a total of 26 dives so I don't have much room to talk.
Here's a few thought's (I numbered them so others can say I'm full of **** on number x

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1 - Dive with different partners. If you always dive as a husband & wife pair, you may find one person always doing certain things. Diving with someone else could make it obvious.
2 - Try some different environments. Things like calm or choppy water, low vis, cold, fresh or salty, etc. Don't make huge changes from what you have experienced previously.
3 - Take a clip board, camera, or something else to occupy your attention with you on a dive. If you are all over the water column and completely frustrated, your advanced class will be like that, only someone will be there to grade you! A few more dives might be worth the time since a frustrating or tiring class might not be fun or promote learning.