I think people count whatever works for them and keeps them motivated. I sometimes count recyclables by the recycling container (1 box of paper/cardboard for instance) or 1 bag of rubbish that can't be recycled if it's all random 'nothing'. The only things that I personally discount are food, general cleaning products and day to day toiletries - if they're 'special' toiletries or sets that I give away untouched then I count them.

I think the most important part is keeping yourself motivated and feeling positive about the progress and the achievement.