In this paper the influence of study activities on academic achievement at university level in Thailand is examined. Furthermore, the extent to which multitasking and the use of technology have now become determining factors in student study behavior is explored. The study concentrated on a group of 318 students (131 males and 187 females) in their final year at Mahidol University International College (MUIC) in Thailand. Results of this research demonstrate that of the 57 factors assessed, 51 showed no correlation between the activities that students engage in while studying and academic achievement, while 6 factors showed a correlation (Criteria: Sig. 0.05 Reject null hypotheses). The conclusion highlights the level to which multitasking and technology play a role in study activities at the tertiary level.