Dig a Pond for Dragonflies
The British Dragonfly Society has recently revised its booklet "Dig a Pond for Dragonflies". The booklet was written to assist people in preparing a suitable habitat for Dragonflies and Damselflies. You should note that this is biased towards the United Kingdom but with adaptation should be useful elsewhere. It is being published here to make it available to enthusiasts worldwide. Dig a Pond For Dragonflies is a .pdf document (3 Mbyte). If you do not have a .pdf reader, it may be downloaded from here.
You may also be interested in an accompanying text "Managing Habitats for Dragonflies" which is also available online.