As promised, here's the fabled GM screen I made for myself. Since Its inception, I've gone on to make 2 more for the other Earthdawn GM's at my table. Not for selfish reasons on my part, nope. They each wanted one of their own. And each is different in its own way. Markus' is green and our other GM's is black. All-in-all I've calculated it to be about $16-17 to make one from scratch including laminating sheets, copies, tape, color copies, etc. No I do not sell them, that would be illegal.
The main tables I use are:
Step/Action dice and Success level. Front and center.
The next most important to me are the Combat Options and Situation modifiers.
The here's the rest I keep front and center: Action Multiplier, Difficulty Number and Barrier Ratings. Never know when someone tries to break through a door instead of opening it.
Climbing difficulty and Falling Damage tables go hand-in-hand and Fire damage (I have a pyromaniac character in my group).
I piece-mealed a perception chart on the left sheet insert. Here's what I have for that: Light Source Visibility, Detection Difficulty, Visibility, Perception Difficulty, Perception Modifier, Navigation Difficulty and the 2 bottom paragraphs on perception from pg 89 of EDC GM's compendium.
The left-hand side of my screen is all weapons tables. Melee, Missile, Shields, Throwing, and Armor. It's great to have for weapons dropped by NPC's and/or random encounters with variety of weapons. Keeps my players honest for single-use hand size and what-not.
My right side screen is for the hard-to-find or downtime miscellany: Study Time for spells, Spell Learning Difficulty, Threadweaving Difficulty, Disbelief Difficulty, Dispel Difficulty are very mixed as far as downtime and combat-oriented. But very helpful to have in a pinch in one location.
Since a lot of exploration in ED is for ruins and cultures not always represented in my party I have the Language Learning Difficulty table handy, the Research table, the Knowledge Test table, and the Key Knowledge table.
For more downtime I have the Hunting and Foraging tables.
Along other dangerous lines I have the Astral Sensing table as I always have a mage or a windling in my party (sometimes both) and I have included the Spell Matrix table and the Raw Magic table though I have yet to use them more than once.
The sheet protectors on the left are the Talent and Talent knack tables from the EDC Player's Compendium. It lets me know what is and is not an action, and what attribute things default to. The sheet protectors on the right are all of the spells. Whichever spell caster is in my group at that time has their school of spells in my screen. This keeps them honest about threads woven, range of the spell's effectiveness, etc etc.