Every teacher has their own classroom management plan, from bribery to "no smiling until Christmas". It took me my full first year of teaching to build and feel secure within my own plan, this is mainly because there is no "One size fits all!", but I am sharing mine as hopefully it will be beneficial and because it has been successful for me and saved my sanity on a number of occasions.

Seating plan. Usually mine is in register order, this helps with learning names and spotting absences quickly.
Clear expectations and set consequences for those who break them. I personally have them displayed for all to see with the consequences and rewards written alongside. You would be surprised that pupils don't argue with the consequences quite so much when it is written. It certainly makes my life easier.
Being fair. Always praising pupils equally and being aware who I ask questions to. Simple things like this gains respect from the pupils which has to be a key goal for any teacher.
Being prompt with rewards and punishments, children forget quickly and if you don't respond to behaviour whether positive or negative with speed, it becomes pointless and a mere exercise.
Be organised! Even if you are not teaching in your own classroom make sure you have everything you need for the lesson. After all, you can't criticise a pupil for not having their equipment if you do not have yours.
Setting out your classroom is a key to owning your room and ensuring that you can instigate your rules. No one classroom I have ever seen is set out in exactly the same way. That is because most classrooms have different purposes. Science and maths will be laid out totally different to that of performing arts. Some teachers prefer to have their tables set out in rows or in small groups. I alter mine depending on the needs of each individual lesson and that of the pupils within that group. I tend to favour the horseshoe layout with a large group table in the middle which I find suits most learners' preferences.
Have a clear starter and plenary. It helps to keep the pupils focused and moves their learning on. An engaging starter is an excellent tool to refocus a class after an excitable break or to get them interested in a new topic. My plenary usually links back to their learning to help them to reflect.
Finally, remember your sense of humour. Teaching can be the most rewarding and enjoyable career, but you need to be able to distinguish between what the pupils class as a "laugh" and what is meant with malice or disrespect.

This management plan is my tool to keeping my classes engaged and respectful. I have established mine through trial and error (many, many errors) to discover what works for me and for my students. Every school, class and indeed pupil will be different, but this plan is a key to building a way forward and creating your very own, unique and effective classroom management plan.

Having a plan is essential to controlling your classroom. Learn more about making your own classroom management plan at http://managementclassroom.com