Short, basically like JoD says, the key is links.
I mean I have a list on the left of my blog which links to other blogs I like but when I'm writing about someone else I always link to them in my posts and others do the same.
Also commenting on other peoples blogs gets you out there.
I always read all of my comments and for example, last week I noticed a new name on the comments, I clicked on it and was taken to a blog I'd never seen before. I commented with her and she came back.
Dont get me wrong, I dont do it for the sales side of it but its nice just to "get out there" iyswim.
Lucykate from here who also posts on thr arts and crafts thread has done amazingly well with her Etsy shop and I think alot of it is to do with her blog following and the fact that she has created a "fan club" before shes started to sell on there.
She has put on 2 batches of her items and on both occasions the stuff has sold the seconds after she has uploaded it all.
I'll link all their Etsy shops for you to look at
This is Tillyboo's shop
Imagingermonkey
Lucykate
Meridian
Theres also Champs etsy shop for her chocolates and Crochata which I think is Rantings.
Madamez, the thing is, bunting, gingham and hearts sell
In fact imagingermonkey is making some for my dd's bedroom atm but not with a ridiculous £50 price tag.
Honestly I am totally hooked with Etsy. Its a wonderful site and has some brilliant stuff on it from some very talented people.