Although, a lot has been said about the good language learners, not much is known about the adult learners and the strategies they use in order to further improve and acquire their second language learning skills. Thus, this study aims to identify language learning strategies employed by successful language learner among adult learners of Teaching English as a Second Language (TESL) students for improving their five main skills which include writing, reading, listening, speaking, vocabulary and grammar. This study employed a mixed-method research design where survey and semistructured interview were conducted in collecting the data. Ten students were selected using purposive sampling technique. The questionnaire for the survey was adopted from Andrew D. Cohen and Julie C. Chi's Language Strategy Use Inventory Semi structured interview was also done for triangulation. Based on the findings, it has been identified that learners use language learning strategies in order to become good language learners. The respondents have pretty much the same preferences in using the language learning strategies. However, although different learners preferred different language learning strategies, there are some strategies that are leading among good language learners. All of the respondents tend to make use of all three categories of language learning strategies which are cognitive, meta-cognitive and socio affective. They tend to use different categories of language learning strategies for different skills that they would to acquire and enhance on.