This is how I go about it, but I may have tougher skin that the avg person - I dont get razor burn easily. I use Mach 3 Turbo
I shave when I'm in the shower, no shaving cream, just constantly running hot water. First I prepare the skin with Dove bar soap - helps the razor and your own skin slide along. I start with running against the grain on the shaft and the patch above it. Then I go with the grain the legs. On the sack, by this time it's now fairly loose (not wrinkled) and I can go against the grain without snagging any skin
When I'm all clean, I just run the bar soap over my bits because it just feels damn good. Ahh what a beautiful feeling.
If you're ever staying at my house, request a separate bar of soap.