False friends are words in two languages that are similar in form but different in meaning (e.g. English "library" "place for reading and borrowing books" vs Spanish "libreria" "bookshop"). From the point of view of EFL teaching and learning, false friends are important because they lead us to errors in L2 production and comprehension (e.g. "I am very constipated"; "it has been a fastidious speech" and "you should eat food without preservatives"). This paper intends to present some useful tools (dictionaries, online resources, glossaries and blogs) for the teaching and learning of false friends. The resources presented here will allow us to discover the complexity of the false friend phenomenon and will contribute to the teaching and to the learning of these words. (Contains 2 figures.)