You wouldn't pack for a vacation at the beach without such things as swimsuits and sunblock. Why go to the hospital unprepared?
It is different because not every stay is planned but you can do a few things to make it easier to get your stay off on the right foot.
Right now make a list of your medications and allergies on a piece of paper and put it in your wallet or purse. Make a copy for a close family member or leave one on the fridge for the paramedics. Update this list when your medications change. You should have your doctors' names and phone numbers on this list as well.
If you are a diabetic, pack your meter and supplies.
While you are in the hospital help the nurses and doctors take care of you and protect your interests while you are at it.
It is important to tell your nurse your medical history. It can serve as a record to speak for you in the future should you arrive at the hospital unable to talk or otherwise severely ill. I don't even expect my own record to be supremely confidential but the information and access to it is protected.
Bring a few snacks appropriate to your health but don't eat them until your doctor has given you permission to eat. Some tests require fasting or other special preparation.
Try not to bring small or unruly children or other guests on first arriving to the hospital. You want your nurse to focus on you and not be distracted. It's also tough to keep your information private when you bring others to the hospital with whom you are uncomfortable sharing.
If your life has a few surprises that will impact your care think carefully and let your nurse know. I have taken care of a number of patients with both a wife and a girlfriend and its not pretty when they both visit and discover each other for the first time in your hospital room.
Bring some shorts or lounging pajamas if you aren't incontinent. Hospital gowns are as ugly and utilitarian as ever! I work with a surgeon who has most of his patients come to surgery wearing scrub pants. We have all seen more butts in this lifetime than we ever wanted to! No offense intended.
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... I could write a book
