I was once a mathematician wannabee so the Trail Laying is gonna start from first principles.
The idea of a hash is to have fun so if the pack isn't enjoying it you've wasted your time and theirs.
When I say pack I meant the whole pack not just those front running bastards members.
If you are at the back of the pack and not so fit it really it's not fun to walk 10 miles and end up at the end just as everyone else is going home. Also if you are old or fat or whatever you probably aren't as good at climbing HUGE walls, cliffs and things like that.
On the other hand if you are a dumb FRB then it sucks if you just run around the block, so a good trail will have lots of loops circle jerks and back checks (ideally just over a fence) to keep the FRBs frustrated and the rest of the pack happy.
Now we've got that out of the way I suppose I'd better give you the details, but I can't expect you to take them in at one go (anyone mention goldfish and attention span?) - so we've made a nice easy download you can print out and read in the loo or wherever.
Since Rule 1 of the hash is "there are no rules" feel free to ignore any and all of them in a good cause.