Instructions
Browse to a free forum website and set up an account. Each site works a little differently, but you should be able to have a fully functioning forum for free within just a few minutes.
Set up two forum areas: a place where people can put current versions of their character stats, bios and activities and a spot where you will play the actual game.
Create an initial posting with the details of the game, its setting and any special rules it will use. It is often a good idea to sticky this post.
Make an initial environment/setting post to get the ball rolling.
Allow the players to respond to your post and to each other.
Decide when turns will change, such as 2 p.m. and 11 p.m. Sunday through Thursday, to allow people time to perform turn-based activities.
Use the turn-change times to post environmental and combat updates.
Keep each collection of events in a single thread, treated as a typical game session.