Russell,
Essentials include a planisphere, red light torch, binoculars, cheshire eyepiece, warm clothes, a thermos of tea or coffee, a notepad, observing stool (to stop dobber's back) and of course your scope.
Nice to haves include a Telrad, extra eyepieces (wait till you are used to observing before even going here), a good barlow lense (Orion Shorty Plus is a good one but costs a bit) and planetarium software (there are some great ones free like Cartes du Ciel -
http://www.stargazing.net/astropc/ - well worth the download.
Above all enjoy and use your scope as often as possible to learn your way around and to get using it to an automatic level.
Cheers