I have a 20x20 ft plot , I want to use for growing vegetables... we are at the coast, soil is rocky, also get the sea breeze. and have lots of wild life, How should I go about starting this veggie garden ? I'm in Ireland... I never grew vegetables before just tomatoes in a pot and they were a great success any tips would be a great help... many thanks.
I would like to thank everyone for taking the time to answer my question...all very good answers and most helpful

Don't try carrots or parsnips! I have very very hard soil here, possibly similar to your rocky soil, and any veggies that grow into the soil end up in a U shape.
Personally I find corn to be quite hardy, and I get rewarding results.
There is quite a good site http://www.irecognisethat.com/show_question.php?question=Is+this+a+wild+Poppy&id =228
that can be helpful when growing veggies for the first time.