From personal experience also, there is simply no getting around it. You go through it no matter what you do. Your Hospice probably offers grief therapy. If they don't there are plenty of therapists who do offer grief counseling. Also many church's have grief groups.

Make sure to read books on the subject.

Treat yourself gently, break everything down into nanoseconds, make sure to remember to eat and drink water, take vitamins, expect to lose concentration, expect to lose friendships, expect a lot of things to change.

Sending my sympathies and prayers.