I hadn't seen this thread before and I want to thank Photophil for taking time to put it together. While I have I am a neophyte compared to him, I do have some comments about Tips & Tricks, though.
"Luring passerines": In the U.S., anyway, the use of playing recordings of bird calls to lure birds is a hot topic among birders and codes of birding ethics deprecate their usage. I'm not taking sides but I want to point out that spring migration brings out birders in droves and it is better to have their cooperation in spotting birds than being surrounded by them lecturing you about birding ethics violations.
"Dragonflies": In my experience, dragonflies have a comfort zone but many will return to the exact same spot the just vacated if you step back. The trick I use is to get just to the edge of that zone, inching my toes forward so there is no sudden movement. then slowly leaning forward from the waist to get the lens closer. I also find that with the lens hood on, I was apt to get so close that I brush the plant the dragonfly has chosen, so I simply remove it when I chase them.
There was a lot of discussion in replies about flies, midges and mosquitoes and how to avoid being bothered by them. I want to add that in the U.S. (I can't speak about other areas), one needs to be very careful about ticks (Lyme Disease, etc.). Many of the bird banders I know swear by anti-tick clothing. I will suggest that whatever clothes you wear should tight-fitting. Tuck your pant legs into high socks, wear long-sleeved shirts with tight cuffs and close-fitting necks, wear a hat and be sure to inspect your body closely when you get back to your base.