Cheelu, you need to do some market research. Visit some local towns (other than yours) see which businesses look the busiest. Walk round your town, are all those types of businesses in your town. If not can you fill the gap?
Take into consideration where your shop is sited;town centre, secondary street, side street. Do some market research; ask people what businesses are missing from the town, what services they would like to see.
What type of antiques/bric-a-brac are you into? There is a growing interest in 'vintiqeing' as it is called, but it is centered on 20th century objects and includes textiles and new handmade products made from vintage materials.
A vintage shop has opened in one of my local towns and seems to be doing very well. Perhaps you could improve your business by refocussing, it is a business you already know. Look in home/lifestyle magazines (Real Homes at one end of the market to Homes & Antiques to Country Living at the other to get the feel for it).
DD has been running a small needlework/vintage business successfully online for over 5 years and because of the growing interest in 1920s - 1980s homeware she has decided to expand into antique fairs and plans to take a stall at several this summer.