Best way to bring back Hosta's for the spring?

If they've over-wintered, the foliage should be dead. (Cut) the dead foliage away and that's it, they'll grow back without much additional effort. Cut away all that's dead, all the way to the ground before the new growth appears. Be careful if you decide to pull the dead away (without cutting) as you may remove some of the newly developed bulbs attached to it.

Just in case you want more info...

If they're near the street and your town puts a good deal of salt and sand on the road, top dress near the plants with gypsum to counteract the effects of road salt and compacted soil conditions. When you see them first sprout from the ground apply a 10-10-10 fertilizer as directed on the label and you're all set for the season as far as amending the soil and nutrients go. Additional fertilizer applications are unnecessary and would only attract unwanted bugs that would eat the foliage.

If the area is prone to dryness, Create a dirt bowl by pushing dirt around the perimeter of the green that pops through in early spring. If you then mulch, mulch right over the bowl you've created to ensure when you water it gets directed toward where it's needed most. The Hosta will soon over grow the size of the ring/ bowl and it will no longer be visible.

If they're in the shade for the better part of the days, they will not grow as well and will be slow to start (sprout) at the beginning of the season.

If when they become too large for any space, you can easily reduce their size by cutting them in half with a shovel and transplanting half elsewhere. Just dig a hole where the transplant will go and plop it right into the hole. Water it in, back-fill and (Done).

After a few years they (all) begin to develop a hard core center as the growth expands outward away from the center. When that happens just dig the center out with a shovel and back fill with as much garden soil as needed to fill the hole. New growth will soon begin to spread back toward the center making them appear more robust and less prone to disease and bug infestations.

Leave them alone and they'll come home. They are incredibly hardy plants in the wild, they grow naturally here under the ski pistes and re-emerge every Spring as right as rain.

In Saskatchewan they die back every year and return in the spring with new leaves without any care. So I don't think you need to do anything. If the old leaves look untidy cut them off.

It is best to remove any dead leaves in the autumn to discourage slugs and snails which may over-winter nearby and demolish any new growth the following spring