I'm feeling a little less anxious about the matter having read everyone's replies. I installed Google Analytics and my 'bounce rate' (ie. people visiting the site then immediately leaving) isn't bad, so people are arriving and staying to have a look around, which is something.
I think NYAF is right. My experience so far is that my keenest customers are the people I've met personally for one reason or another. My impression is that not only are they keen to give their framing work to me, their chum, but also are finding things to frame which otherwise would never have made it to a framing shop. So this week I went along to the local art society, got introduced to their members, gave out a load of business cards and have been invited to do an hour's presentation on framing in March. All of which, I hope, will add up to some new custom.
Word of mouth, I'm not sure of yet. I can't honestly think of any of my customers who arrived having heard about me from a friend. But then it's still early days.
And I also had some very thorough feedback from a new customer who'd read the website from cover to cover, and it seems the messages I've been keen to put out there are getting through, which is good news. Will just have to have a little faith and hold my nerve!
Thanks for all your responses
