For example, gardening. Basic weeding and cutting back of overgrown plants can be a great way to relax the mind, whilst not having to sit still and 'try' and clear your mind - a typical perception of the more passive style of meditation. (Not always true, by the way.)
Often I notice the little things, just walking through the garden. Like this:

Another form of active meditation for me is spinning yarn, which is so lovely as I let the spinning action of the yarn twist and grab hold of each bunch of loose fibres I hold in my hand. The rhythmic & gentle pumping of the treddle to turn the wheel creates, for me, a kind of rocking and soothing motion that lulls me into a wonderfully peaceful place....


I'm sure if we all look at the simple things in life that create a calmness we hadn't really noticed before, perhaps we might learn to see them as little saviours each day. They help us to keep our feet on the ground, not let the complexities of life win over our sanity, and they are good for our sense of self, oneness. That's important, because we find that our true selves, without the layers of externalities like impressions, expectations, obligations and general material elements of day to day living, are really quite peaceful, and thrive on opportunities to feel that calmness.
So, take a walk around your garden and notice the lovely things, sit in a park and watch the birds or the people coming & going, or the ripples on a river or shore, and let your mind just float...