I can't remember, did I start as a GM back as R.I.D and abandon the game when I suddenly left?
If I did I am terribly sorry.
I have been GM in many FtF games and multiple times in email games. I want to praise ANYBODY who does it. For one, knowing the rules is very hard work, and even after this many years I am still not 100% knowledgeable. In the most recent game I hosted, I actually got asked a question I'd never been asked before, and whilst I thought the answer was obvious I had never looked it up, so I had to turn to the rule books. (Question was, can you voluntarily disband one of your own units in the build phase and if you can, can you build a replacement unit in the same turn? To me it seemed obvious that you couldn't voluntarily disband, but I did have to turn to the rules to check... I was right.)
I use Adobe Photoshop to manage my games now, but I used to use GIMP which was just as good for the job.
I haven't read all the 'becoming a GM' articles so this may of already been mentioned (probably has)
- it is SO important that the map you start with is a good quality image, and it is so much easier if it has no breaks in the border outlines (hooray for the magic wand tool).
- Also important to have a good grasp of using layers.
- And to dedicate an entire folder to the games images.
- Never delete maps of phases from an ongoing game.
- And for the love of everything holy, use a sensible naming convention for your images of maps - I saw a friend trying to GM a game and it took him 20 mins to find the right map because he used really long names that weren't particularly informative.
I use a folder for each game with the title of the map and a unique number (counting up from 1 each time that map is played).
Inside the folder I have 'the_board.psd'. This is my main PSD that gets updated every time. At the end of each phase I save a .jpg copy as 'year_season_phase' for example '1901_Winter_Build' or '1902_Spring_Retreats'. You get it.
Finally, and the real reason I am posting here, is to praise all of you GM's here that do a fantastic job of maintaining games in your spare time! You are awesome. THANK YOU.I may get involved in a forum variant sometime soon, but I doubt I'll be GM'ing anytime soon. Maybe one day though, I would like to GM, when I'm less busy

Penguin.