Wow, there's so much to cover on that.
1. Work load wise, how many pts are you going to be responsible for? There aren't that many meds scheduled through the first half of the shift generally. Mostly prns. If your facility does your thyroid meds early, then you will have those to pass, and w/ LTC, that's A LOT of people (our facility, we have approval from medical director and pharmacy that they can be given at 4pm). You will also most likely have morning blood sugar checks/insulins to give.
2. Paperwork wise, get to know your facility paperwork. LTC generally chart by exception, meaning anyone on antibiotics, any falls/incidents/skin tears. If you have medicare pts, they are charted on every shift. Learn what paperwork is required if you have to send someone out or if an incident has occurred.
3. Treatments generally don't happen, most are just q shift creams that need to be applied. I know some nurses will pass that on to the aides, I don't like that habit. If there's something there, I want to see it.
4. Over the course of a few shifts (mine took me about 2 weeks total), make up a cheat sheet for your residents. Diagnosis, code status, allergies, meds/treatments, any equipment, oxygen, etc. I kept that list with me at all times until I became familiar with the residents.
5. Ask your aides about the residents, they can tell you sooo much. Make sure to go behind them and check that their work is being done. (I know I'm gonna get flamed for this). You are new to them, you don't know them, they don't know you. A good aide is worth their weight in gold tenfold, but you won't learn that sitting behind a desk. My aides are my right and left arms, but they know that I do periodically mark briefs/pads to make sure they are being done.
6. If this is not a normal shift for you to work, make sure you get your uninterrupted rest during the day (cannot stress that enough). There is usually a down time during the night when you become tired (I'm a night owl, but 0330-0400 still catches me sometimes), get up and walk around. Also, do not let yourself go w/o eating/taking a break.
There's loads more that can be said, but I hope this at least helps you some.