Practice getting ready for work and getting there before your 1st shift. Make sure you have clean uniforms ready and plan your transportation.
Pay attention during training and take notes. Ask questions as you are training and ask more questions when you arrive at your next shift.
If you aren't sure what to do to say stay busy, ask! There are always tasks to be done and you are being paid by the hour. The more you do, the more you learn also.
Show up to work with a positive attitude, stay away from drama and think about what you can learn from your job.