Great advice from the previous poster. I would add, your command will offer a pre-deployment night to address communication, important dates, resources, etc. Those are mandatory for you, and optional for your loved ones. I would suggest inviting your spouse/significate other if you have one. This will allow them to connect with others in your command and ask questions. If anyone is helping with your finances on the homefront (mom, girlfriend, friend), I would also suggest opening a separate account and only deposit the amount to cover your bills. I've heard too many stories of over spending and the Sailor comes home to zero money saved. If your spouse is a spender, I'd also suggest two accounts and a savings account you can control. You'll both be happier when you return and can have that long weekend or mini vacation celebrating your homecoming. Retail therapy can put a dent in homecoming plans for sure! At our last command 70% of the Sailors were on their first deployment, so know that you are not alone! Since I'm a spouse and not a Sailor, my advice is from that perspective. I invite those experienced Sailors reading this to comment with their advice! Best of luck, you'll do great!
If you are married, please get your significant other a POA (Power of Attorney). I cannot tell you how much this will help! If you are not married a POA is even more vital as it will allow someone you trust to act on your behalf. Make sure it is someone you trust but it can be invaluable!