Will be based in broadstairs intending to do whitstable .hearn bay and deal any other nice towns i should visit
I gather you are preferring to travel by train, so Faversham is another 'nice' town that I recommend people visit. It's the stop after Whitstable on the train but totally different - it's not on the coast and has a very historic, pedestrianised town centre easily walkable from the train station, loads of pubs (including two micropubs) and a brewery.
www.faversham.org/visit_faversham.aspx has plenty of info
In the other direction between Broadstairs and Deal is Sandwich, an incredibly historic teeny-weeny little town like nowhere else in Kent for it's well-preserved old town.
I see you're already planning to visit Canterbury which is the other obvious choice.
Don't forget to check www.visitkentoffers.co.uk to check for 2 for 1 attraction offers in the places you might be visiting.
Depends how you define nice but ramsgate has some great architecture, though a bit run down these days
Its about 45 miles away but Rye is a lovely town