Top teaching "hacks"?

[2slicesoftoast]

I know I'm crazy. it's not even half way through the holidays here and I'm already thinking about the classroom BUT I came across a great tip on another thread that is inspired.... a school that punches holes in exercise books and worksheets and the pupils use treasury tags to keep them in place. I love it!
I'll add one of mine. My pupils sit in groups so I name each group and label the books with a sticker corresponding to the group name (Eiffel Tower, Buckingham Palace, Empire State Building....). Makes handing our books so quick and the start of lessons much slicker.
Any one willing to share their time saving Ideas?

Slot of these tips are great but it's made me think. Majority of them are for marking, and there seems to be a drive from teachers towards efficient, effective marking. However, the majority of the tips given would not be allowed in my last school (not working atm). It seems the best hack of all would be to persuade SLT to trust our professional judgement with regards to assessment.