changing the activity or doing a status assessment when students are restless/not engaged

Classroom support material and notes are important or lesson plans won't be as effective. Keep an open mind and be creative with staying current with information and technology. I utilize rubrics in the classroom for assessment as a clear cut way to grade, so as to avoid concerns or controversy, should it arise. Know the classroom demographic and learning styles while striving to make the order and flow of course content logical, sequential and engaging. Also remember to take notes, lots of notes.

Lesson plans are written together with the objectives chosen for a specific course. Objectives are intended to be measurable, specific and concise giving the students an idea of what they will learn and the skills they will develop. You should set standards to increase their abitlity to perform while conducting assessments to measure a student's progress toward meeting the set standards

Lesson plans give direction.

Goals and objectives are important to keep you on track.

Always be organized. 

Make a folder, both physical and electronic of lesson plan.

It's important to be good at time management in your classroom. Make sure you have enough to teach in the time you have, but also have backup just in case you have extra time. Also it is important to engage your students in different fashions and finding out how much they know on a subject is important as well.