Reconnecting central heating radiator?

I have my radiator in one room taken off the wall to plaster. What is the sequence for reconnecting the rad without getting air locks. Which valve do I open first? Thermostatic or other side. Do I let the rad fill up before opening the other valve? Do I let the air out via the bleed valves before I open the other valve? Does pump need to be on? Any help appreciated. Thanks.