A friend of mine talked me into going on this tour because it's something of a pub crawl, walking tour, and a great activity for fans of literature. It kicks off at the Beehive Inn at the Grassmarket at 7:30. My tip is to arrive early, book a spot on the tour, and have dinner at the Inn (which serves excellent food and so far my favorite cider in the United Kingdom). Our guides were Paul and Sharon, who were both highly informative and excellent actors so that even someone like me (who knows next to nothing about Scots literature) was both entertained throughout and better-educated by the time it ended. The tour stops at about four pubs, so pace yourself if you've decided to drink. Also, depending on what time of year you go and where you're from (i.e. how well you can stand cold temperatures and genuinely gusty wind), my advice is to bundle up as best as you can. It's altogether a great way to spend two and a half hours. Even if you take nothing away from the tour itself, you'll at least enjoy yourself because the guides are great fun.