Fireworks - I earn 1000+ credits a time
Fireworks Level 1 - Stage 1-3 - gain about 42-43 k if not higher
Level 2 Stage 1-3 - gain a total of 100k +
Level 3 Stage 1-3 - gain a total of 140k +
Level 4 Stage 1-3 - gain a total of 185k +
Level 5 Stage 1-2 - gain a total of 227k+
Level 5 Stage 3 - Gain a total of 240K as close as possible without going under ,
finish second or third with 240k score roughly , you gain the 300 i think for getting on fifth lvl and first timers get firework pin and you also get 1k credits a time ( takes about 20 - 25 mins)
Do this about five times for most effective , also get in the practice

Yeti Vision - Level 3 Earns 200 credits and a couch sell for 50 credits
( takes 2-4 mins a time) , do this about 20 times for bunch of credits
Talk to all the characters in VMK
Main Street : Esmeralda : Emporium - 50 credits first time other time 25
Fantasyland: Dungeon : Dragon , Matterhorn : Yeti
Adventureland: Sunken Ned's Shop:Ned the head, Pirate treehouse: Pirate
Frontierland: Haunted mansion : 3 rooms wait for 3 ghosts to pop in each room
Tommorowland: none i know of
( takes 10 - 15 mins depending on ghost pop )
400 credit first day , 200 credit other day can do this once a day
Mix music and play music daily/hourly
- gains 50 a hour i believe
3 minutes tops
when playing music i usually crash so be careful
Trade items for items- Takes vary amount of time , random reward
If have not entered the credit codes , do so - 5 minutes
A way some people do it is make multiple accounts use codes on those accounts ( mules ) , i personally dont like that but nothing i can do heh
do this and you should be average with the easy credit thing , within a hour you could easily have 10,000 credits if you do it right