When you go in and see the patient tomorrow, write a regular progress note. Note urine output, JP drain output, any nausea or vomiting, and whether or not the patient is tolerating the current diet (and note whatever diet that is - clear liquids, sips only, regular house diet, etc). Do a regular physical exam, listening to heart, lungs, etc. Check the incision, and note if it is c/d/i (clean/dry/intact). See if the patient's pain is reasonable for the size of his/her operation, or if it is out of proportion. There will be other things to check for, depending on what operation was done, but this should be enough to get you started.