How strict is your employer about butt-in-seat schedule? If you have full flexibility, I’d suggest aiming to hit 40 hours on a weekly basis rather than 8 on a daily basis. That gives you the flexibility to work, say, 10 hours one day because you’re really on a roll, and to stop at 6 hours the next afternoon when you’re tired and distracted without feeling guilty. Don’t go over 40 hours on a regular basis. That’s a re…
Work should be focused on productivity, not hours spent. Employers, clients and managers have expectations of a quantity of work being accomplished for a specific budget, and it doesn't matter to them if its done in 2hrs or 200hrs.