When it is time to clean up toys after playing, take the opportunity to help your child practice sorting toys into the appropriate bins, containers or parts of the room. This will work best if you set up a consistent and logical storage system in advance. Divide toys according to some category like color, type or size and define a place for each category to go, such as red toys in the red bin or stuffed animals in the corner. Guide your child as he finds the right place to put away each toy.
When you take out a load of wash, you can include kindergarten-aged kids in the sorting process. Since young children may not be able to fold clothes or handle folded clothes without unfolding them, allow your child to supervise the sorting by telling you which pile to put each piece of clothing into as you fold. This will also allow you to train and gently correct your child if she sorts incorrectly. Let your child join you as you put each pile of clothes in its proper place to help her relate sorting to reality.
Sorting nesting bowls, airtight containers or pots and pans can help kids develop a sense of how size affects sorting decisions. Pull out a variety of kitchen containers and let your child practice sorting them by type, color or size for as long as he is interested. After some experimentation, point out that sorting them into nesting sets lets you put each pile together in a smaller space, which is useful for storing them more efficiently.
When unloading the dishwasher, you can let your child sort and put away the silverware. This is a simple and useful way for young children to practice sorting, since items that go together are nearly identical and there are clearly separate bins for each type of item. Before giving the dishwasher's silverware basket to your child to sort, make sure there are no sharp knives in it. If she has trouble getting silverware out of the basket, remove a handful at a time and give them to her to sort.