Set aside time. Don't rush. Take a room at a time and methodically clear it out.
Drawers, cupboards and surfaces - each item should be assigned a place. If it doesn't have a place, it's clutter.
If you don't use it regularly or absolutely love it, throw it away.
Think about the sort of body that you want. Make a list of the food that will help you achieve that body.
Organise what you want to eat in advance and buy complete meals, not snack foods.
List all the items that you need and shop for only those items.
Live in the present, not the past. Don't let any more clutter into your house.