I would make sure you visit several houses. Years ago when we first went looking we almost bought the first house we saw, we were just excited at the idea of buying a house, and it would have been a huge mistake on a housing estate with a reputation.
I have to visit a house more than once to know, so forget checking everything such as do all the doors work, is there wood worm etc, you can investigate that on a second visit. First visit I'd just concentrate on your key points that you aren't prepared to compromise on, whether it's the access to the garden, no neighbours, which way it faces, everything else can wait till next time if it passes the first hurdle of having those things and wanting to go back. And maybe gentle questioning on how quick they want to sell, and if they have found somewhere already.