A solution to the consistency problem is to take notes while you wing it, and type them up after the game. I log all my game sessions both as a player and as a DM, and so I have seldom consistency problems.
Usually my notes are structured like this:
"Background" outlining the background of an adventure
"Open Ends" listing lose ends from the last session, mostly things the PCs have yet to do or were planning to do last session
"Hook": notes on getting the PCs involved in the adventure
"Rumors/Information" detailing where, how and what kind of information the PCs can gather, and how reliable it is
"Happenings" things that will come to pass, generally not that much under control of the PCs, like a state visit from a neighbouring country, a storm forcing ships into port, a new law getting passed resulting in a riot etc. Those things may be influenced or even prevented by the actions of the PCs, but it is not too likely.
"Dangers/Obstacles" listing what problems the PCs will face
"Possible solutions" listing pssible ways to solve and survive the different dangers and problems
"NPCs" detailing the different NPCs, often only a description and the goals of the NPC, sometimes a full statted sheet.
Usually my notes are structured like this:
"Background" outlining the background of an adventure
"Open Ends" listing lose ends from the last session, mostly things the PCs have yet to do or were planning to do last session
"Hook": notes on getting the PCs involved in the adventure
"Rumors/Information" detailing where, how and what kind of information the PCs can gather, and how reliable it is
"Happenings" things that will come to pass, generally not that much under control of the PCs, like a state visit from a neighbouring country, a storm forcing ships into port, a new law getting passed resulting in a riot etc. Those things may be influenced or even prevented by the actions of the PCs, but it is not too likely.
"Dangers/Obstacles" listing what problems the PCs will face
"Possible solutions" listing pssible ways to solve and survive the different dangers and problems
"NPCs" detailing the different NPCs, often only a description and the goals of the NPC, sometimes a full statted sheet.