Write your own Tests.
Write your own Worksheets.
Always reinvent the wheel.
The students will know if you took a quiz, test, assignment out of a book or from a colleague because it could never match up to what the class was doing. If the assignment is unimportant enough to write it yourself why should the students take it seriously?
You are modeling the behavior you want your students to have. Don't get angry or punish them for being like you.
Project Based Learning needs progressive assessment.
Progressive assessment needs to be individualized for the students, not the teacher.