If you're an artist:
- Do not hand out your own personal business cards at your opening and/or an art fair where your work is being exhibited. What you should do is work it out with the gallery, and if agreed, make your own personal business cards that list the gallery (and not you) as the contact point.
- Do not start a relationship with a gallery without a contract or written agreement.
- Do not vary your prices from dealer to dealer, or city to city, etc. What you should do is to have an established process (via contract/written agreement) where it details what discounts (if any) are offered in cases of multiple buys, museum sales, etc.
- Do not have "art sales." This hurts your established price points.
- Do not have prices in your website, instead force interested collectors into communicating with you or your gallery. Make sure that you note your gallery representation in your website.
If you are a gallerist:
- Do not operate on a handshake; always have a contract or written agreement.
- Do not hide the names/address of buyers. All that accomplishes is that it tells the artist: "I don't trust you."
- Don't work out price issues on the fly. Work out pricing issues ahead of time to ensure that you and your artists are all clear on all possible scenarios.
- Don't skip on art insurance.
- Don't take too long to pay your artists (period should be specified in your written agreement/contract (such as "Artist will be paid within ___ days from the time that the artwork payment clears").
If you are an art collector:
- Don't undercut the gallery by "skipping" them and going directly to the artist.
- Don't trust art dealers/artists who offer prodigious discounts on the artwork - nearly always that means that the prices were inflated to start with.
- Don't be afraid to ask if the artwork is done to conservation standards.
- Don't call a painting a "picture."