Research suggests that the adequate use of lexical phrases (e.g., phrasal verbs and collocations) helps L2 learners become competent not only in speech but also in writing skills. Despite the importance of these phrases, they are widely recognized as a major source of confusion for L2 learners. Considering how the learning of such lexical phrases can be facilitated is a valuable question to address. To this end, for the past few years, I have been working primarily on exploring how practice opportunities for given collocations should be distributed for efficient learning to take place. Based on findings of the existing studies, my PhD study will further look at how collocational items should be ordered in learning material by manipulating factors including semantic transparency level and the timing of explicit instruction.