9. If Your Gun Runs Out Of Ammo, Definitely Throw It Away
If a gun runs out of ammo, you absolutely, positively must remember to ditch it straight away, because you couldn't possibly acquire more ammo at any point, could you now? Granted, we rarely see action heroes actually going out and buying their weapons, so we assume they must be loaded or get an awesome action hero discount of some kind, because the money you'd burn through just errantly throwing away guns every time they're empty is unimaginable. Surely it makes more economic sense to keep the gun and just buy more rounds next time? What's the point James Bond having all of those finely-tailored pockets if he can't fit a few magazines in them?