So John, when a customer is wavering back and forth between two mat combos, either of which looks fine, and then starts pulling other colors, what do you do? Do you tell her "this looks best" and put the others away? Do you tell her to act like an adult and make up her mind already?
How do you politely force an indecisive person to make a decision?
"I would suggest you take the time to go to your local library and check out a few books on salesmanship."
The books will teach you that selling is a craft, or an art, not just a vocation. The books will also teach you that a good salesperson is not a manipulator who "makes" people purchase unnecessary items.
A good salesperson controls the sale by having a basic plan. In our industry we could suggest several things to keep the sale moving along. Only work on one picture at a time, set all other pictures on another table, put your effort into just that one. Don't be afraid to explain to the customer that by bouncing back and forth between pictures gets us nowhere and leads to design confusion and wasted time.
As Wendy suggested above, keep the design area clean and not cluttered up with rejected samples.
If you are worth your salt as a frame designer, you know right off the bat what will look great and enhance that picture. Get that design down as quick as you can.
Never design by price, start out by finding what looks best, ignore the price. If it turns out to be beyond what your customer can or wants to spend, at least you have the hardest part done, the actual design. Now you can look for lower priced but similar looking frames that will produce a similar effect.
I have to disagree with Wendy's suggestion of asking them what they like least, that is introducing a negative into the sale that could well lead to a lost sale. Keep everything positive. Asking them what they like least could start them thinking "this whole experience," or worse.
It is imperative to understand that what takes place in the first fifteen minutes will decide how that sale is going. After fifteen minutes of looking at designs, the customer goes blind, they can not tell a good design from a bad one. If you go beyond that fifteen minutes without the customer liking anything you put down and are still undecided, you have lost control of the sale and stand a good chance of losing it completely.
There are many more suggestions as related to selling custom framing that I am sure will be brought up.
Get the books, learn the principals of salesmanship. It will make a huge difference on your bottom line.
John