Question
How do you know if you re-potted correctly? I'm new to this and I think I'm killing my orchids so I need help badly.

Answer
Maria; I'll assume that you have phalaenopsis orchids.  The steps I use is to first obtain some new plastic pots with lots of drainage holes in the bottom.  Then obtain a good grade of orchid potting mix.  This should have fir bark and a few other ingredients and be specifically for orchids.  Home Depot and Lowes carry a couple of different brands. Soak the fir bark while proceeding with the next steps.  Remove the old potting mix and discard it.  Check the roots and remove any that are mushy or stringy (healthy roots are firm and turn green when wet).  Insert the healthy roots into a clean pot and add wet potting mix a handful at a time, tapping the side of the pot as you do so to help distribute the potting mix among the roots. Continue until the potting mix is about one inch from the top of the pot and  the base of the plant is even with the top of the potting mix.  You will need to do the repotting in an area where the wet potting mix can drain freely from the drainage holes.  Set the plant in an area to complete the drainage. In about a week, return the plant to your growing area.  Do not let the pot stand in water. Water weekly and, in about a month, you may begin to feed the plant with 1/4 tsp of plant food per gallon of water.  Repeat this process with each plant that you repot.  It will take a month or more before you will notice any new growth.  Place the plant in an east facing window growing area if you have one.