1. I would create promotion code for our listings at Amazon.es.(High quality but lowest price)
2. I need someone post the promotion information at some social media(like Facebook, Twitter, ect) and some popular local spanish Deal website(just like slickdeal or Reddit in USA)
Facebook: 800+ local spainish followers(mostly friends, colleague) or you enjoy high reputation at some local spainish facebook group(10,000+ memebers)
Twitter or any other social media: 800+ local spainish followers(mostly friends, colleague), and you are always interactive with many followers.
Deal website: It must be the top-traffic deal or promotion website in local Spain. And you know clearly how it works and have ever posted some promotion information there and enjoy high reputation.
Other forum: It have top-traffic and gathers many e-shopping customers.
4. what you post all depends on your experience and marketing skills, but it must be very attractive and include some information...