Why? So that you both set off in the same frame of mind, you make it clear what you want and neither of you ends up disappointed or frustrated (his idea of a cultural trip turns out to be a Teletext holiday to Malaga, or your idea of mountain adventure involves daily sessions of sun worship, etc etc). "Make sure you're on the same wavelength, and once you get there remember his expectations," says our expert.
How? Talk before you book! Don't just discuss what you want to do and where you want to go: take turns at explaining what you want from your break together. Are you out just to have fun in the sun, discover new places, spend quality time together, get to know each other better...? Make things clear from the outset.
Create the right moment to plan your holiday: go out for a meal or a drink specially to discuss it. You'll find it easier to have a constructive conversation.