It will also be hard to remain calm when something is going on next door that isn't to your liking.

As long as you have been operating within the statutes of the local landlord/tenant law and the terms of your contract (the lease), then it sounds like it is time to serve notice and begin the eviction process.However, you might try a knock on the door first and see if a calm tête-à-tête might resolve things.

I calmed my girlfriend down (lest blood spurt out of here eyes) and reminded her, "this is why we have insurance.

That calmed him down and we're finally able to move forward.  

Without being biased the new tenants were calm, but highly concerned that they made a mistake, living next to someone like was lot going to be possible.

This rarely works.I've also had people call me or my manager and calmly and logically explain a situation. 

I don’t think you need to be an A-hole, I start my relationships with my tenants very cool and calm and simply layout the rules in my lease addendum.

It looks like a calm area.

The Cascades are named that because of the waterfalls.

I'm really anxious to get my first deal done to calm my nerves.Thanks in advance!