What immediate actions should a pilot take upon detecting smoke in the cockpit?

Upon detecting smoke in the cockpit, the pilot's immediate actions should be to don oxygen if available, identify the source of the smoke if possible, and prepare for a potential emergency landing. Putting on oxygen is the first priority to protect the pilot from incapacitation due to smoke inhalation. If time and circumstances permit, the pilot should attempt to identify the source of the smoke by checking instruments, electrical panels, and other potential sources. The pilot should then prepare for a possible emergency landing by notifying air traffic control, selecting a suitable landing site, and running through the emergency checklist for smoke or fire in the cockpit. It is critical to act quickly and decisively to address the situation before it escalates.