I have three sides to my business,
one is making and selling personalised cushions and other keepsake gifts and one is selling craft tools and accessories.
I have noticed, and this is pointed out on the Etsy forums, that the more items you have in your shop the further up the searches you go.
I find Etsy easier than Folksy and have had way more sales on there, although there has been an increase in Folksy sales in the last few months.
I would say that all my Folksy sales have been to the UK, all my website sales have been to the UK but my Etsy sales have been all over the world ( a lot to USA, Germany, Spain, Australia, Argentina, France, Hungary).
My website has the slowest of the three to take off as you have to get it found on the search engines, work on your meta tags, get links, submit to directories.
You have to network online, ie, join teams on etsy, twitter, FB, pinterest, blogs, forums etc.
You have to make sure your photographs are 'bright' and uncluttered ( I cant tell you have many times I have retaken photos and edited them).
Join UKhandmade and/or Creative Connections to get help and advice, they are both free and you get a page to customise for yourself and upload your photos and websites.
Sign up to Vistaprint and wait until they send you emails with free offers, you can get flyers, banners, labels, business cards etc and only pay minimum postage.
I got friendly with the people in the post office and the local craft shop, wool shop and fabric shop and they put a flyer up for me and a small stack of my business cards on the side.
Every time I send an order out I include a business card which has details of all my websites.
Look at sites like WowThankYou, where you have to apply to sell with them and send pics of your items before they accept you, I paid £35 joining fee and they take 10% commission on every sale, but they advertise on the web and in major magazines.
My third stream of income which will take the most work at first but will then be a passive form of income is adwords based on my websites.
So, hope fully, if you've managed to read to the end of this without getting bored I've given you some useful tips.
Good Luck! (I don't mind if you've got other questions)