Although design­ing usable sys­tems requires far more than sim­ply apply­ing guide­lines, guide­lines can still make a sig­nif­i­cant con­tri­bu­tion to usabil­ity by pro­mot­ing con­sis­tency and good prac­tice. We use this list of guide­lines in our con­sul­tancy work. For best results, remem­ber to inter­pret the guide­line in con­text — this requires a bit more thought but ensures you will get a lot more from your review. —  David Travis, July 6, 2009

http://www.userfocus.co.uk/resources/guidelines.html