Sakis Triantafyllakis has attended MWC for 5 consecutive years as part of Tech Talks Central. He provides tips for optimizing attendance at large international events like MWC, emphasizing the importance of having clear goals and metrics to evaluate whether the event was worthwhile based on meetings closed, outreach, and desired versus actual outcomes. Sakis also stresses professionalism, preparation with business cards, and using impactful visuals to achieve goals and exceed expectations.