Congrats on the twins -- my twin daughters are now 5, and it is an amazing experience all around.
I recommend that you talk to your OB/GYN about birthing options, which are a logical thing to be thinking about now, but remember that your birth experience is a tiny fraction of your life with these children. I had hoped for a vginal birth -- which my doctor supported in theory -- but ended up with a C-section because my "Baby A" (the one who would clearly be born first, because of her position) was significantly smaller than my "Baby B." C-sections are common in this scenario, because the first baby doesn't clear the way enough for the larger, second baby. I also didn't go into labor -- my birth was scheduled at 36 weeks because my blood pressure by that point was very high, and the babies weren't really growing any more. My point is simply that twin pregnancies have more factors to consider than singleton ones, so be flexible in your vision!
I also recommend you be thinking now about breastfeeding, which is absolutely doable with twins, though some may try to discourage you. If it is important to you, consider taking a breastfeeding course before your babies are born, and/or speaking with a lactation consultant ahead of time. It will take a lot of support at first, but in my case I found it totally worth it!
As for names, we went with very different names that were in the same "era" -- Nora and Lucy. This was my grandmother's name and that of her sister. For me, it is important to remember that my daughters are two individuals who aren't a "set," even though they were both born on the same day. I never refer to them as "the twins" -- advice another mother of twins gave me right after they were born.
Take care of yourself over these next few months/weeks and good luck with the pregnancy, birth, and hazy first weeks of caring for two newborns!
-A.