I never paid much attention to horror stories about dealing with twins.
They were my first, so I did not have to worry about making sure that another one was cared for and feeling loved.
My recommendation is to nap when you can. Somewhere along the way, I must have simply trained myself not to sleep. This means that now, when they are 16 months and sleep well, I am totally exhausted all the time because I don't sleep at night, even thought they do. Relax and enjoy as much as you can.
Another thing that worked for me ... (I know some people don't like this) ... I pushed them to be on a similar schedule. If one of them woke up to nurse, I would get the other one up to nurse. If one was obviously in need of a nap, we would encourage the other one to lie down, too.
Oh, something we did that I think that we shouldn't have done ... When one would make the slightest noise, we would rush to get her out of their crib so as not to disturb the other. I think that many of the noises being made were just restless sleep noises and we ended up unnecessarily waking a half-asleep baby who would have put herself contentedly back to sleep. I now realize that when they are asleep, they can sleep through anything! I recommend trying to resist the urge to comfort at every little whimper. You can tell the difference between a whimper that needs love and attention and one that is just a normal sleep sound.
I love watching them interact. It is amazing how different two personalities can be given that they have the same parents, the same environment, the same background, at the same time!