Do your students need to leave the room all the time for the bathroom, water fountain, trips to the office, or forgotten supplies? Do your students ask for emergency extra credit? Mine too!
At the beginning of each marking period, I give my students a sheet of grace passes to stash in their folder to use whenever they need it. No questions asked. Bathroom break? Use a grace pass. Left your homework in your locker? Use a grace pass. Need 2 extra points on the quiz they struggled with? Use a grace pass. They can do this five times per marking period and no more. It's like a free forgiveness. As a bonus, the fifth pass can also be used for a free homework night. This comes in handy at my school where almost all of the students are involved in multiple extra-curricular activities.
As an incentive to not use the grace passes throughout the marking period, students can redeem their passes on the last day of the marking period for a reward. Stickers, candy, etc.