Errr, 3 map a day? Thats more than enough. It is honestly quality over quantity. You could in truth be making 20 a day, and they could all suck.
Lets see, I will choose one map to make. I will then lay out the basic form, add details, put events, and finally test. If testing fails, I start over , fixing errors as I found them.
I would suggest one full map a day (meaning, if lets say it is a city, you also complete the small interiors), do that 5 days a week, and you are doing great. Each day, you should also develop some of the character history, develop teh story, work on unique sprites and tiles, and finally, playtest.
BTW, I am back from my... year long hiatus! Yay me!
To put in perspective, I am restarting my RPGXP game making, but I am unpleased with many of my maps, hence, reemapping. Take the time to make the maps you make worth your time.
Also, any screens of your maps? We could comment and suggest things if you like.