Firstly, check out the sections on thornies and spotteds on the main website. Also try local tackle shops and anglers for up to date info. Be careful though coz in some areas not many anglers know how to catch them. Information can therefore be sparse and of indeterminate age.
Try to narrow your hunt down to one or two marks and fish them a lot. As a general guide try big tides, high quality fishy baits (sandeel, squid, mackerel, herring), peeler crab, prawn, and preferably at night. That's just to give you the best chance of a fish. You might like to tell us where you are and what species you're after so that people can give you more specific info for your area.
Rock Hopper this one (if the piccy has uploaded) was from your neck of the woods last Saturday - and is the one that started the "discussion" with Blueskip.
It was a 9lb Thornback (wouldn't open its wings for the piccy) taken at Fresh Water East on a 4/0 3/0 pennel loop rig 3' bottom snood on sandeel/mackarel and squid. caught just as tide started to make after bottom water.