Summarize the following:
Place the tack strips about 0.25 to 0.5 inches (0.64 to 1.27 cm) from the wall in a straight line. Make sure the tacks are pointed toward the wall, not the center of the room. Use 2 nails for each strip, nailing it into the wood below. Some tack strips come with the nails already in place, and you just hit them in.  If you need to cut a strip to size, slice through it with a handsaw.  On concrete, you may be able to just pound it in the same way if the concrete is soft enough. If not, drill holes where the nails go using a concrete bit of the same size and then pound aluminum nails in. You'll also need tacking strips around things like floor vents. Roll out the padding, starting from one side of the room and moving to the other. Slice it off with a box cutter when you get to the other wall, making sure you have enough on both ends. Cut it just on the inside of the tack strips. Roll out the next set of padding right next to the first. Make sure you're matching up the seams evenly so that you don't have hills and valleys on the floor. Walk across the floor and press staples into place every 2 feet (0.61 m) or so. Also, make sure to staple the padding along the inside edge of the tacking strip to hold it in place against the strip. With concrete, you need to put padding glue down underneath the padding instead. In that case, just lift up one side at a time to apply the glue in an even layer. After you've rolled and cut the whole floor, use a long piece of duct tape down each seam. You may need to use more than 1 strip, but the duct tape will help keep the seams together. Smooth it out with your hands to make sure it won't come up.

Summary:
Nail the tack strips into place as needed. Lay out the padding on the floor. Staple the padding into place with a staple gun. Duct tape the seams together.