Fruits that are cut for you can cost anywhere between 50 to 150% more than if you bought the whole fruits and cut them yourself.
When you cut them you control the quality of the fruit and its ripeness. How many times did you buy cup pineapple that was sour or bitter, I know I did few times in the past?
Butcher/cut up meat is the other big saver:
From a whole chicken for example you can have 3 meals for 2 (legs and wings, breasts, and corpus).
Leftover bones are perfect for a soup, so don't throw them out.
Flavoured oatmeals:
Store bought flavoured oatmeals are packed with unnecessary ingredients and are more expensive than buying plain oatmeal in the bulk store (i.e., BulkBarn in Canada).
It is easy to add your own spices such as cinnamon, cardamom, anise, vanilla, or nutmeg. And top it up with fresh or frozen fruits and nuts and seeds for a healthy breakfast.
Soups:
Soups are perfect meals when you are in a rush, to warm up in winter time, or for a all rounded healthy meal.
Store bought soups are often packed with unnecessary additives and sodium. By making your own you have a full control of the quality and quantity of each ingredient.
They are a great way to minimize waste of fresh produce in your kitchen.
Desserts:
Making desserts has never been easier, there are so many kitchen gadgets from blenders to ice cream and popsicle makers that buying chemical laden desserts is not necessary.
A little bit of preparation in advance and you can indulge in guilt free desserts.
Breads:
Speciality breads can be very expensive and often they do not taste that great.
Baking breads takes a little bit of practice and experimentation, however it is worth the effort as you end up with a beautiful smelling house and delicious bread that fits your diet requirements.