My one recommendation is to begin developing a predictable, unemotional bye-bye routine, followed by a similar welcome-home routine. Maybe something like read a book together, and then mommy gives three kisses and waves bye-bye while daddy whisks junior off for a bath (or something else fun) -- a walk would be good, too, because it is easier to be the leave-er than the leave-ee, so if daddy and junior go for a walk when mommy leaves, you can all wave bye-bye and go do your thing. IME separation anxiety is normal and completely heartrending at the time, but it is also something kids can and do adjust to, often more quickly than mom. And the more predictable and unemotional you can make the routines, the more quickly the kids adjust. Added bonus is that a routine like that is something you can start doing now, so by the time you start work, it is second nature.
I gotta say, my DD was the total drama queen; as much as she loved her daycare, she would cry and cling and sob like I was heading off to the gallows. It broke my heart. And then one day I said goodbye to my sobbing little remora, but instead of leaving, I hid outside the door. I swear it was not even 30 seconds before the sobs completely stopped and she was more-than-happily playing with the other kids. Meanwhile, when my mom (a/k/a the soft touch) dropped her off, DD continued the giant meltdowns and heart-rending sobs for-freaking-ever. But it wasn't good for her, either; as traumatic as it was for my mom, it was worse for DD, who really got herself so worked up that it took her a long, long time to calm down.