A couple of web sites that have nothing to do with Highland attire, but will help you dress better in the kilt.
The Essential Black Tie Guide
How to Fold a Pocket Square
Lastly, a lot of contemporary Scottish dress has a nineteenth century flare to it -- so why not shop around at places specializing in nineteenth century clothing to see if you can't find that perfect accessory for your next Burns Night, to really set your outfit apart from the rest. Here's one of my favorite places to browse.
The Gentlemen's Emporium