The first few months can be hard if you've not lived away from home before. I found it incredibly difficult, being away from my family, my girlfriend(thank fudge I won't this time around lol).
I surprisingly found going to the church, both during the Sunday sermon, and during the evenings some nights rather helpful, having a chat to the padre(who was awesome). And trust me, before I went in the army, I was a MASSIVE atheist, but there was something about the atmosphere in the church that helped comfort me, as well as lighting candles for the ones I cared for.
Also letters from home were also nice, they make you miss people, but they also make you remember they are there for you always. They are better than phone calls because you can Re-Read them over and over.
Also, lots of phone calls are also good, you should get time to call your family in the evenings etc. Just for the LOVE of god don't take a phone out with you on exercise, unless you want to get yourself and the rest of your troop beasted to hell lol.