First things first- Buy or download Mors Kochanski's book Bushcraft, and watch everyone of his youtube videos! He's basically the grandfather of Bushcraft. Richard Graves-Bushcraft is another good book, Ray Mears, Tom Brown Jr, etc. I'd def recommend practicing first or you'll end up lost and dead- no joke. I can attest that ALONE is a pretty legit show as I was picked in the running order for season 2 but unfortunately didn't make the final cut. I think they want people with families so on the show they get emotional and start crying and saying how bad they miss their kids etc. I was single and ready for the long haul. Got sent camera equipment and everything, signed a non-disclosure, etc. Oh well. Life goes on. Watch ALONE. You'll see that getting food isn't as easy as most people sound when you're WAAAY OFF THE BEATEN PATH. Sure, food is easy to get if you're only ten or 20 miles from a town. Different story if you're way off in the Rockies, N Cascades, etc. It always looks easier than it really is- hence how Chris McCandless ended up starving. He lasted like 110 days out there, which is pretty damn good as most people have supplies flown in or they go to town every so often to stock up.
Another idea is to do like I did and go work in Alaska for a season and learn from other people who've truly lived out in the Bush before just jumping into something that could kill you.
Hypothermia is a big killer. Read up on how to treat medical issues such as hypothermia, etc. etc.
Also, If you're afraid of bears or cougars you're in for a treat. Learn how to deal with those threats. Last thing you want is to end up stuffed in a bear den or end up cougar food. A trick with that is get a beanie and sew or pin on what looks like 2 eyes onto the back of your hat. Cougars are stealthy and usually attack from behind at the neck(from research).
DICK PROENNEKE IS A LEGEND. READ HIS BOOKS. He was such a master craftsmen. He actually spent time in the area he moved to before hand and had friends who had their cabin there and also friends who lived not far(by plane) from there in Port Alsworth(I visited there). He talks about how he worked and saved before he moved out to Lake Clarke to see if he could last a year and ended up living there over 30 years. His journals are REALLY informative. He wrote every day he was there- about his food, weather, mountains, animals, etc. 30 years worth of observation of the AK Wilderness.