Productivity experts weigh in on how to avoid the post-vacation crash and transition back to work smoothly.Vacations are a much-needed balm to weary souls. A few days of sun, friends and rest can help banish the stress of urgent requests, crabby colleagues and unreasonable deadlines. But you don’t want your post-vacation high to become a post-vacation crash when you see the pile of work that awaits you. To keep your restorative mood intact, you want to make the transition back to work as smooth as possible.   Here are some of the best tips productivity experts shared on what they do when they come back to work from vacation to avoid feeling stressed by the grind. Their answers were lightly edited for clarity and length.1. They admit they can’t respond to everyone at once.“One of the most important things that I do before I go on vacation to keep me from being overwhelmed after is I put up an autoresponder that is a little bit more detailed than ‘Hey, I’m out of the office from this day to this day.’Instead, I have a really detailed out-of-offic