Trim spikes. If your spikes are healthy and green, trim one inch above the top node. If the spikes have turned yellow or brown, trim one inch above the bottom node.
Remove your orchid from the old container, removing any media that is attached to the roots.
Trim off any dead or dying roots, these roots will be brown and soft, as opposed to live roots which are firm and white (or green).
Place the orchid plant into the new container so that the base of the lowest leaf is approximately a half inch below the rim or the same depth as the previous container.
Gently scatter the new media around the roots pressing it down lightly with your fingers, and then carefully tap the pot to settle the media. Continue to add media until it reaches the base of the lowest leaf.