Well Ive bragged about the breeds capability on tracking so I guess I ought to say something. Im certainly not a pro butI love GSPs and took a few coursesin tracking wounded game.

I keep deer feet in the freeser and tie a string in them. Thawed I pull it after me to create a scent trail. I buy blood and with a plastic bottle with a small hole in the capI drip some blood every other step or so. Go very easy on the blood. 3 dl lasts more than half a mile.Begin with a strait line maybe 30 m to see how interested the dog is. If the dog doesnt find it intresting I would drop some sweet in the tracks here and there. This increases joy but also helps keep the nose where it should be when tracking. Make the track lie for a few hours and go after and let the dog take the leg. Lots of praise. Lots and lots.
Increase difficulty with time, add angles, add track time, lessenblood amount and go up in length.

Never ever control the dog or show him where the track is. Just put him on the track and observe him. If he goes wrong let him try to work it out for himself. If he fails take him to the beginning of the track or a at least a good bit behind where he got wrong.

A good investment is a bunch of, laundry pinchers (or whatever the word is for those clamps that hold laundry when it dries)that you attach to marking plastic stipes so you can markwhere you go. When you are finished take them with you backtracking so that the dogs get used to return the same way. If you decide you wanta bringselrapporter orattack dog this will be a good habbit.
Some prefers special tracking harnesses for the dog but I use a wide collar and try to keep it between the dogs fron legs, again to help keep the nose low. To this I tie a 10 meter nylon line. Make sure this is with a slippery surface or it will get hung up everywhere.

Again Ive turneda postinto a book but I hope there is something in it for you. Again Im not saying that there are no other ways but this works for me. Good luck with yourtraining. Its great fun.