There are several sites I like to use to plan wardrobe and sewing. The one that everyone probably knows by now is, of course, Pinterest. If you haven't checked this site out, you totally should. It's basically a website to build inspiration boards. You can pin pretty much any picture from the internet, except from Facebook. You can make any boards you like. You get few ready made, but these can be deleted. I like to use it for planning something special, like I had this inspiration board for my charleston/flapper dress (well, I might still use it and make another one...). If you want, you can follow me here.
Well, I don't talk more about Pinterest, since everyone seems to know it already. But there are other sites that seem to be less known. One, that I like, where you can make mood boards or plan outfits, is Polyvore. I like that you can actually plan what goes together, since I use Pinterest as a more general inspiration. I haven't used it a whole lot yet, but to get the idea, here's one of my mood boards for spring outfit:
You can see my other sets and follow me here. I also sometimes pin Polyvore sets to Pinterest. You can use the ready items from different online shops or you can clip your own images with Polyvore's clipping tool. There are also templates you can use, if you don't like the white background, or you can make a template of your own. I did a little practice run, but the sets are easy to design, especially with a white background. Why don't you give it a try?
The last site I want to introduce is Chip It by Sherwin Williams. Here you can take any picture from the internet and their program gives you the main colours from it. Here is one of mine as an example. It's not as social as the other sites, but you can also pin these images to Pinterest. It's a great way to get colour palettes, if you like colours in a certain picture.
I'd love to hear in the comments what is your favorite inspiration site!