Don't put it on too small a tree.If the tree sways in the wind,you will get false triggers every 10 seconds or whatever your delay is set on.As stated,you don't want branches within the detection zone that may sway in the wind but you need to also lookout for weeds that may spring up in front of the camera.A weed can go from almost nothing to tall enough to cause false triggers during a wind,in about 2 weeks.I try to check mine about once a week when I can and check for such issues.
It is a good idea to keep them out of hard,direct sunlight in the hottest part of the summer.If you have bears,don't handle the camera if you have any food odors on your hands.Personally,I use bear boxes on all my cameras.It solves a lot of problems.
I use my digital pocket camera to view SD cards at the site and keep an extra SD card for each trail camera so I can change them out to bring a card home that has pictures.
When I view pictures at the scene,I try to analyze any false triggers and see if I can correct the issue then and their.Often it is something like a weed that sprouted up and the sun is hitting it.I carry a folding saw and a light,2' brush axe for any needed trimming.
I used to try to set mine aiming North when possible but the terrain and situation often dictate which way it will be.I do try to avoid aiming at any mid day hot spots caused by the sun.
If you are setting on trails,you probably want the shortest time delay between shots as possible.That will still only get you one shot of most traveling animals.If you set at a feeder,bait or mineral lick,you may need to increase your time delay.