Preparing for your eventual demise is a gift your loved ones will appreciate even as they mourn your loss — and it will give you peace of mind in the present, too. Most people have thought about setting up a will and doing other estate planning, but you should also arm your family with the most essential information they’ll need in the immediate days and weeks after you’re gone, preferably in one easy-to-access place. Here’s how to set up a digital version of Myrna’s “little black book” for simple and secure information sharing with family members and trusted friends.