I am a new grad out of orientation for several weeks and so far these are things that have helped my transition.
Added to what the others posted...
Find what works best for you. Try a clipboard with highlighters and red pens. Check off your meds when you give them and write down the time given that way you're not picking your brain as to what time you gave such and such this med. Write down important labs, VS, Blood Sugars, etc in a separate place where you can find them easily.
Listen to report of experienced nurses, even before you become an RN if you happen to work as an aide. That can be one of the best initial learning experiences. It also helps you learn the technical lingo.
Be a patient advocate even if it means bothering people. Call logistics for that IV pump for your new patient, even if its been 4 times and they haven't come yet. Ask an experienced nurse a question, even it it seems "dumb" or "you should know that by now." Pay attention to your gutt. Instincts usually tell more than we think.
Also, remember that every day you learn something new. And every mistake you make, reminds you next time to not redo the same mistake. Remind yourself you're a work in progress and you will NEVER be perfect.
Overall, find a good preceptor, and if you're not happy with the one you're with, ask for a new one. Get a mentor you trust and feel confident with and know you're not alone. We all have gone through this (and going through this).