First, avoid delaying preliminary and general examinations. Second, keep up with your entry cohort of PhD students. Third, your dissertation is not your life's work. Find a research topic that is relevant to the profession but one that is well-defined and can be completed within a reasonable time period, say, a year. Fourth, check the track record of potential dissertation advisors. Choose one who has advised many successful recent PhD recipients who found employment at attractive institutions. Fifth, try to finish your PhD requirements before accepting your first full-time job. If this is not possible, be sure to keep up progress on your dissertation and maintain contact with your dissertation advisor and keep your completion of your degree among your top priorities.
For grad students to complete their study program on time, they should equip themselves with time management and study skills, such as, among others, keeping track of tasks and assignments, working smart (not hard), and prioritizing what they do. More relevant tips are referenced below.
GradSchoolHub. (2021, March 19). 5 time management habits for graduate students. Grad School Hub. https://www.gradschoolhub.com/lists/5-time-management-habits-for-graduate-students/
GradSchoolHub. (2021, March 15). 5 study tips for graduate students. https://www.gradschoolhub.com/lists/5-study-tips-for-graduate-students/