So I'm late coming to the pre-purchased adventure world. I've never run a premade before in my 22 years of being a Dungeon Master. I've taken things from them of course but I've never actually run one cover-to-cover completely, I have always ended up running through with my own story. That being said I'm rather excited to run MiBG, so much so that I have created a DM Aide in the form of a tracking sheet. (Potential Spoilers for Players?)
I'm a fairly organized DM and I like having continuity between sessions down to the lowliest NPC. I figure if I want to keep track of the different happenings and how the players interact within the adventure a sheet to make notes on regarding decisions and event happenings would help. If I've missed something please let me know.
MiBG - DM's Sheet.xlsx
For more ideas (additional encounters, player handouts, etc.) I direct you to the Murder in Baldur's Gate Encounters forum -- we filled it chock full of good stuff!
In play, I would have hard a hard time using your cheat sheet, just because my group was all over the map with changing loyalties, betrayals and new alliances, and so on. Good Shakespearean, Greek-tragedy type stuff! Good times, good times.