One of my current works in progress takes place mostly in London during the 1788 Season. I was aware that fashions evolved in the 18th century, with noticeable differences between decades and more radical changes after the French Revolution.
To help me visualize my characters and their social scene, I spent some time researching the fashions of the 1780s. When I first started writing, this would have involved a trip to the library and possibly a lengthy wait for an inter-library loan. Now, thanks to some excellent museum websites, I did not even have to leave the house.
Thanks to Pinterest (which I am only beginning to use), I have a handy place to gather my research for future reference.
While I enjoy oohing and aahing over the beautiful women's garments, I find the men's garments far more distracting. There is nothing like a well-tailored silk waistcoat with a dozen tiny buttons to make me think about undoing them.