From Digital Book World:
Authors looking to boost book promotion efforts should consider incorporating a presence on Goodreads. It’s an established site filled with potential to really boost book marketing plans. In fact, some authors have elevated this to an art form and have become Goodreads rock stars. (If you need tips on best practices, read this article.) Once you’ve established yourself on Goodreads, adding Goodreads giveaways to your marketing plan is a solid next step.
Many authors are hesitant to do a Goodreads giveaway, and this may be because they’ve heard that others have had mixed results. Doing a giveaway correctly can really help boost exposure for your book—Goodreads readers love giveaways. According to Goodreads, more than 40,000 readers enter a giveaway every single day.
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You’ll see that there are four tabs on the giveaway page: Ending soon, Most Requested, Popular Authors and Recently Listed. You want to be in one or even two of those categories. Ending Soon and Recently Listed will help to maximize your exposure on the site. As a rule, I recommend giveaways last one or two weeks. Also, it’s a great idea to run giveaways back to back.
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Take a look at popular end dates, and then choose something else to avoid competing for visibility. The list may thin out after a day or two, so watch for days that don’t have as many giveaways ending. As you get ready to kick off your giveaway, keep in mind that Goodreads requires a seven-day notice before launching, and giveaways must run for a minimum of seven days.
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Goodreads gives you a 1,500-character limit for your book description. The first six lines matter most since they appear next to your book cover during the giveaway. Consider editing the standard copy that Goodreads suggests, namely the “Enter for a chance to win one of X copies.” Although these details are essential, they are included under “Enter Giveaway.” For the first few lines, consider adding any big blurbs or great reviews. Remember, people like what other people like.
Link to the rest at Digital Book World