I find it really helpful to know where the stuff is in the zones i am playing in. If i need Ammo, Health, etc. Here is a sheet i use to track those things i need, created in Excel, I print it on both sides of a sheet to save paper. Zones and items will change every time you enter a rundown. This one is for my A1C1. I cross out those i have picked up so i know what is left. For example in this sheet ZONE 19, has 2 each MEDIPACK, AMMOPACK, and TOOL_REFILL. all the other only have one of each. When i start a rundown i use "LIST A ZONE_XX" this will list everything available in that Zone. Hopefully this will help you get thru a challenging game. if you need AMMO in a particular zone just go to a console and type, "PING AMMOPACK_707" using the number associated with that particular item from the list. I also put the key number and color associated with the particular Zone its needed for with it. under the zone number on the edge. This may take a few minutes in the beginning but it really helps when you are low on health or ammo, before you set off an alarm. Hopefully this helps in a already difficult game.