If you look at the requirements for a Regulation 14 NH Plan consultation you won't go far wrong.
Essentially, announce when its going to held, its duration and closing date. Publicise in the local press, and the usual council places. Tell the public where and how they can respond. As Graeme suggests, ensure they can get hold of a hard copy, or download one.
In the past we have had a number of late responses - so wise to give a bit of leeway on that. Closing on a Monday morning at noon will allow a weekend for people to give a response for example. Start the consultation a few days after the press announcement has been made is another example. Send a copy to all the stake holders you can think of and asking for feedback, and ensure they have a copy a few days before official start of the consultation.
Have someone you trust, and who has had very little to do with the project, to proof read the document and hopefully spot any inconsistencies.
Good luck with your plan.