One trick I employed yesterday was to find a stick and jab it in to the ground at 45 degrees over the water and just sat and waited for them to come to me. Dragonflies tend to hunt from a suitable perch nearby so if you make one, they'll often use it once they spot it. Depends on the species though. The big hawkers seem to like to hang vertically from a tree or reed. The smaller chasers and darters sit on top of logs, twigs and reeds from what I've seen.
Any ideas what these are? Don't seem to have the fixed wings of a dragon fly but their bodies don't look like Damselflies
Saw them land they were quite small so I couldn't see them well. They were a lot more interesting when I cropped in later at home. Kinda look a bit like baby dragonflies if it wasn't for the wings.
A little bit of insect romance by Phal44, on Flickr
Up close and personal by JonTaylor71, on Flickr
Love this one