I would suggest you 'pin' lots of good quality photos from round the web (as opposed to just re-pinning content). These will appear in the various categories on the site and people will see them. If they consistently like your stuff they will follow you. I'd also comment lots on people's pictures, follow as many people as you can and repin people's stuff.
Also post stuff you've pinned to Facebook and Twitter, so that your friends and followers on there may choose to follow you.