Well, being nice and enthusiastic can help too. We went to see our last house a bit out of curiosity, as it was 'out of our league' and we just loved it, but couldn't stretch to the asking price or a reasonable offer- the owners were so nice and we didn't feel like making a low offer- as we felt it would be unfair. By chance- I bumped into one of their daughters at Waitrose 2 weeks later- and she came and talked to me. Why didn't you make an offer, my parents just want YOUR family to have the house and the garden, as you were the only ones to clearly fall in love with the house? I explained that it would be our dream indeed, but that we could not afford it- having looked at the work that needed to be done, etc. She phoned me in the evening to ask if we could go for a drink with her and her parents the next evening- and said, just work out what his your max price, and make an honest and true offer. We stretched finances as far as they would go, which was substantially below the asking price, and made the offer when we were having a drink. They said 'done- we want a happy family here, as happy as we have been and who would love the house too'- we shook hands, hugged, we all cried and had another drink- sold our own house on first viewer and moved in about 5 weeks later.