-WEEDS-
  
Weeds are the most common, and annoying things, blocking you from that perfect town. Make
sure to have a weekly "plucking" session, where you search your town for the
little annoying things XD. You can get away with a perfect town with 3 or 4 weeds left,
but they look ugly, so pluck them anyway.
-TRASH-
No trash on the ground. It may sound easy, but when your wardrobe, and pockets are full,
it hard to resist dumping that c.rap on the ground. Go to Tom Nook, he doesnt pay you, but
hey, your getting a perfect town right Also the Recycling Bin in the Town Hall, is emptied
at 6AM every Monday and Thursday.
-FLOWERS-
Flowers are one of the harder parts of getting a perfect town. You can try dividing your
town into 16 x 16 "acres" and make sure that there are 3 flowers per
"acre". This may be true, but make sure you have lots of flowers. Hybrids can be
made, and they look very nice, and cant be bought, or you can just by from Tom Nook.
Hybrid patterns (AC Community)
http://www.animalcrossingcommunity.com/acww_hybrid_guide.asp
-TREES-
This is the hardest part, to get your town perfect. Here's a top tip: Trees WILL 99% of
the time grow when you plant a sapling where a weed is. As long as it in a suitable place,
it works. 
I hope your town can become perfect with my guide! Please leave feedback!
Hope I helped! =D