I've connected Instagram both to Twitter and Facebook. Since last night (and this morning),I have posted four pictures. With one of them getting 14 shares and 15 likes on Facebook! I've had an extra 9 likes to my facebook page and now have 40 followers on Instagram.
I only opened the account last night! I've tried to do as the article James posted suggested. I've 'gone out there' with my images. The one I posted which got 14 shares last night was a quote image.
I'm going to try and stick at this one, it is really quick and easy to use as well.