Have a good night's sleep so your brain is super alert every day.
Each evening look at tomorrow morning's list. Arrive early to make sure your morning trays are carefully prepared (this takes longer than you might expect). Come back 10 mins early from lunch to prepare the afternoon's trays. Then you won't feel flustered. If you don't know what's needed for a procedure, ask your dentist. If your dentist tends to arrive one second before the patient appointment time ask them to come earlier and go through setup with you... they will appreciate you making the effort.
Remember what you're there for: room + procedure prep, patient prep, patient care (comfort + safety ie retraction, suction, monitoring), dentist assisting (light, mixing, passing, measuring, note-taking). We are also there to protect our dentist if any accusation is made
Keep your Levisons as bedtime reading. The charting and the language of teeth will seem difficult at first then suddenly become clear. If you take the typodonts (teeth + jaw models) into the lunchroom with you each day any questions you want to ask the other nurses to 'point + explain'. At the beginning I was too shy to ask my dentist ... so busy and I didn't want to waste his time. I learned most from other nurses.
Also, keep in mind that although your dentist tells you this is the way to do a procedure, other dentists will insist their way is right (with the same outcome in mind!)
Good luck - there is a real enjment in taking care of every patient perfectly!