Weak defense of your ideas
This is the biggest mistake and the most significant gap for interior designers.
When studying on courses, a lot of attention is always paid to design, and almost nothing to negotiations with the customer.
Although if you communicate well and can sell any idea, even if you are an average designer, then there will be fewer problems. If, on the contrary, you are a brilliant designer, but you don't know how to communicate, then it will be much more difficult for you to sell your services.
And problems will arise not only at the stage of signing the contract.
While working on a design project, you present and defend your ideas to the customer, communicate with builders and suppliers. And at every stage without communication skills, difficulties will await you.
Rarely in touch
It is recommended to constantly keep in touch with the customer so that he is calm. If you suddenly disappear, then many customers may be seriously worried!
Be in touch and let the initiative in communication come from you.