M.D.
My husband retired before we got married, so I never did it as a wife, but my dad didn't retire until I was in 10th grade. So I grew up with my mom doing it.
Honestly, your community will become your family. Ask for help when you need it and graciously accept it. Be there to help others in the same shoes as well.
Find things you can do to pass the time quickly...and if you need organization, start planning now. Making changes now such as planning meals, homework time, activities, etc will make it easier when you do it on your own.
My mom always had us make countdown crafts for when my dad was gone. The ring chain works really well and is fun for kids. If it's a year, that will be a HUGE chain, so maybe break it up between when he will be home (I assume he will get a two week R&R, but I could be wrong).
Start using SKYPE now. Get the kids used to using the computer (not sure how old they are, but as early as 3 or 4, they should be able to figure out how to call daddy or answer his calls).
Can you write letters? If so, that helps BIG time. We loved sending things to my dad and loved even more getting things back from him. Even a small note that my mom could slip in our lunch boxes was priceless to us.
My friend's daughter is 14 months and she has a teddy bear that her husband will sleep with for a week or so before he leaves, so his scent is on the bear for a long time while he is delpoyed. That helps her young daughter a lot.
One piece of advice I can give to make your life easier is to start taking on the task of doing things your husband does before he leaves. For example, if he always does bedtime, you should start doing it. That way it will be easier when he is gone and can't help. I know it stinks, but it really will make it easier for you next August.
Thank YOU and your kids for your sacrifice, and please tell your husband thank you as well!