The first task you'll face is to cut back dead stems. Spring is a great time to cut back any dead materials that you left in place over the winter (dead plant matter is a valuable support system for pollinators and insects!).
If no new growth is coming up through the ground, then cut the dead stems as low as you can go to make it easier for the new growth to come to the surface. If new growth is appearing through the soil, be gentle and cut as close to the new growth as you can, without damaging it.
If the dead stems or old growth have flopped over, gently give the material a tug to remove it. If the material comes out easily, pull as much away from the new growth as possible, allowing the plant to be exposed. Pulling or tugging is recommended for day lilies, hostas, and grasses and is easier than cutting.
Woody perennials such as lavender, artemisa, and russian sage should be pruned in the spring to maximize growth, since they produce new blooms from existing branches. Prune just above the new growth. Other evergreen perennials, such as coral bells, keep their foliage though winter, so just cut the damaged leaves and the plant will start to produce new foliage shortly.