I've tried to start a few threads, nothing has really stuck so far. I moved from Backroom to Receiving and I really like it so much more; best part is my STL has my back on my receiving hours - between 6 and noon no one can ask me to do anything, I am a department of one and I make my own routine. Plus, weekends off? Receiving is pretty cool.
Best advice for training is bring a notebook and take notes. Receiving is a very detail-intensive job. Make sure you know the PRO and SCAC for Fedex, Fedex Ground, UPS, how to check all of those in, how to check in Starbucks orders, etc. There are lots of little details it is helpful to write down until you remember them.
Also, chances are your store will be different from the one you train in, be sure to go in aware of that. You'll learn a lot of things that will carry over directly but not necessarily the routine. My trainer's routine was totally different from the one I wound up working, but you'll need to lay one out for yourself. Do some recon at your own store and chat with your TL/ETL, as well as the training Receiver about putting together a routine.
Be sure to post if you have any questions, myself and our other Breakroom members will definitely help out. Congratz on the move!