As others will suggest, wait about a 1000miles before you start adding goodies, so you'll get the best bang for your buck/pound!
Stuff I've put on and really like;
H&B crash bars,
Speedy flat foot, mirror extenders and passenger lowering pegs (check out his other stuff at www.motowerk.com
Givi bracket and 35 topbox,
Throttle rocker and throttle lock.
Heated gear outlet for gloves and jacket.
TomTom GPS and mounting bracket.
I've stayed with the stock windshield and I like it 5'11" 180lbs 12.8stone, but there are dozen of options out there.
I do a lot of long distance touring (500 miles or so in a day), so also added an Airhawk seat and sheep skin. Again there are numerous aftermarket seat options.
All of the above I would do again after 18 months and 13,000miles.
Enjoy you new toy.