Disclosed herein are various tools and devices for use in spinal surgery. In one embodiment, a spinal guide device is provided having a guide member with a positioning element that is adapted to engage a portion of a vertebra to position the guide member relative to the vertebra. The guide member can also include a retractor guide that is adapted to guide a retractor therethrough to retract tissue adjacent to the distal end of the guide member. Various tissue retractors, bone preparation tools, and spinal implants are also disclosed.