Whether it is on purpose or an honest accident, incorrectly citing a source or failing to cite a source is an act of plagiarism. Writers caught in this type of plagiarism often get their resources mixed-up, lose track of a source, have poorly organized notes, or simply run out of time. Effective organization and management of all resources used in your research process is essential to proper citation and avoiding plagiarism.
One of the most effective strategies for avoiding plagiarism is taking thorough and complete notes. Over time, it is easy to lose track of the details of your notes. Something that you pulled word for word from a source could easily be mistaken as something you paraphrased.
Many incidents of plagiarism can be avoided by appropriately paraphrasing from your reference sources.