Okay, most of this is tips and tricks from military spouses I've met through the years, but it really works for any kind of separation.
1) Make a paper chain. You know those old school ones where you just take strips of paper, loop them to make circles in a chain. Make one circle for each week left of the absence. Each week, the kids get to rip one off. If they want to, I would say let them each have their own chain, that way they don't have to take turns ripping.
2) DEFINITELY keep up with the Skyping and phone calls.
3) Sounds old school, but write letters and send care packages if you can. Those handwritten letters mean SO much more than an email ever could. Have your kids draw/paint/whatever pictures or something to send.
4) Encourage the kids (and yourself) to keep a diary. Diaries/journals are wonderful tools. If you want you can use it to keep record of the things the kids do so you don't forget to tell your husband things when you get to talk to him. You can also use it as somewhere to vent every frustration you're going to come across (because you will) and that diary will never judge or get tired of listening.
5) The resiliency comes with time. My first deployment was terrible. I had a new baby (he left when she was 2 months), I was working full-time as a teacher (so even more emotion on top of what I already had going on), and I had NO idea how to handle what was going on. Was I ready for him to be home by the end of the deployment? ABSOLUTELY, but I also had things figured out and had a system going.
6) Find the system that works for you. I have to make (and keep to) a daily chore schedule to keep up on housework. I try to schedule things to do with the kids to keep us all occupied.
7) Have the kids help make a scrapbook. Heck, have each each of the kids make their own scrapbook with their favorite pictures of them and dad.
8) Find a regular babysitter. You will need a break. Even if it's just once a month, find someone who can watch your child and get a girls night together.
Also, try to make sure that when he IS home on breaks that it is spent as much with just you and the kids as possible. Best of luck to you!