If you have sand or compost or mild manure or topsoil in dry loose form, I'd go out with a bag and identify all the deposits first. Scan, toss a bit of contrasting material over the piles, move on to scan some more. Then when you go with a shovel you can pick up a few deposits at a time.
Of course if you are just now seeing them with snow melt, they'll be easy to spot.
Different things work for different people.
If I'm out for a walk, I carry the plastic sleeves the newspapers come in, slip it over my hand and pick up the stuff, then invert the bag. That would be harder to do with multiple deposits, but I've done it with a large dog's piles too.