To do a lab really well, have your report done well in advance. If you can't get the answer in the usual manner, start at the answer and derive the question. If that doesn't work, start at both ends and try to find a common middle. In case of doubt, make it sound convincing. Do not believe in miracles-rely on them.
Team work is essential.
It allows you to blame someone else. In any collection of data, the figures that most closely confirm the theory are wrong. No one you ask for help will see the mistakes either. Everybody who stops by with unsought advice will see them immediately. If an experiment works, you must be using the wrong equipment.