Placing Characters on the Map

If the PCs are already moving on a grid, as often happens in buildings and complexes, you already know where they are when they roll initiative. If they're moving in free-form exploration, place them on the map when they roll initiative. The fastest way is to have the players set up their miniatures or tokens in a basic marching order ahead of time, then just move them onto the map in that formation. When that doesn't work, such as when one or more PCs were in a different location or the map doesn't fit the marching order, you can either set up the PC minis yourself, then ask if everybody is happy with where they are, or have the players place their own minis. If you find having the players do it themselves causes too much indecision (especially if they try to count out distances in advance), you can switch methods. Remember to place characters using Stealth in reasonable hiding spots, even if that means you have to adjust the marching order to do so.