First there are tests, like a complete blood count, electrocardiogram, and most important tests that measure blood clotting. Any blood thinning medications, such as asprin should be discontinued at least 10 days before surgery.
Most important preparation is for the general anesthesia technique used in laminectomy procedure. Fasting for at least 8 hours before operation is important. Other preparation includes mental preparation.
You should prepare to have someone available to assist you with day to day living post surgery. It may be a good idea to place thing that you will need in easy reach, as plenty of comfort items. It is a good idea to have shoes or slippers that can be slipped on. Read a spinal pain support forum.
Well you can't really prepare for this health procedure. Make sure you take all your documents for you and then make sure your wearing light clothes. Also you might want to tie your hair back. Another thing is just make sure that you are well equipped for the powerful procedure.
ask your all the queries get claried about the surgery and post surgery. explain your doctor about you medication, alergy of medecines if any, stop smoking / drinks, follow doctors instructions.