Understanding your design needs and making sure that the designer gets the idea is of utmost importance. Make sure the designer knows what he is woking with in terms of space and budget and also the style that you are looking at. Be realistic in your expectations and with a little help from internet resources you can save a bundle on trying to redo your home.Working with the designer to make sure that he knows what you want and also to be able to hear and have an open mind to his ideas and collaboratively come to an understanding can give a better shape to the design you have in mind.
Let the designer know if there are any ideas you would like to share and the kind of space you need work on. redoing a room or a home can be very expensive but if you have a preset budget and are working on aroom by room budget and sticking to it then let the designer know that and work with them to fit your redecorating on that budget.