If your working 100+ hours per week, it will not only affect your attendance, but it can decreased your performance. There's only so much coffee and energy you can take before your burnout. So try to get as much sleep as possible so your attendance and performance will be good. When planning out your day, always try to leave enough space to leave early for work. Ifs a Friday and you'll know theres traffic leave earlier. That why you can start your shift productively and on time. At the of the day if you are always late it can hinder your career and opportunities