I put these labels on the inside flaps of my students' homework/take home folders.
On one side of the HW folder, I put the tonight's hw sticker on the flap. This lets parents know what the homework is for tonight and a place where they can always find flyers, letters, or handouts sent home with their children. This is also a great way to keep students organized and put some of that responsibility back on them. :)
The other label is for the other side of the HW folder. Once students complete an assignment, they put it on this side. That way, the HW side doesn't look so intimidating when they have 6 completed worksheets and 1 assignment to finish. This is supposed to give them a sense of accomplishment and encouragement when they go home and sit down to complete their homework.