Hosting a giveaway on your blog can be an effective & fun way to increase your traffic & social numbers. I organize and co-host many giveaways throughout the year and Twitter is one of the best social sites for getting the work out. People that like entering contests and giveaways, track these hashtags so make sure they see your giveaway!
Use different combinations of these Twitter hashtags for giveaways every time you tweet about your giveaway. Tweet at different times to reach more people. I also try to include a hashtag that is currently trending for some extra traction. Look for ones that have days of the week in them, like #GoodSaturday or #SundayMorning.