It is a great list...very comprehensive.

My only concern is that it might be too much of a list for a 3 year old to comprehend IYKWIM? By my calculations your little boy has the potential to get up to 20 stickers per day if he does all those things right, I think you might find that after a while it wont become an incentive anymore, instead it will become more of a "chore" and he will start to think "Oh well if I dont get a sticker this time then I will get one in a few mins time when I do xyz".

We have a "reward" chart but in reality there are only around 5-7 opportunities per day for the kids to earn a sticker so they are more keen to do it. I would combine a few steps, eg one sticker for the whole getting dressed routine and putting nappy in bin.