I would estimate the different types of waste to be:
Plastic and foil-like packages: 55%
2. How can you improve the quality of your data?
The quality of my data could be improved by gathering more information on a daily basis during a couple of days or weeks. This will confirm if the initial assumption for each of the percentages was correct. I could also gather data from a small compost bin in my kitchen which will provide a broader view by including another type of waste.
3. How can you reduce your waste? Do you see any specific kind of product you use more often?
I believe we should minimize plastic waste by utilizing reusable water bottles and re-filling them instead of using the disposable plastic bottles. Similarly, we should replace paper towels with reusable towels as much as we can.