Cross-cultural business mistakes happen even to experienced travellers. Many of these errors are preventable through basic awareness. A common mistake is approaching cultural preparation as box-ticking. Memorising specific rules without grasping the underlying logic leaves professionals fragile in actual interactions. Effective preparation works at the level of cultural logic rather than memorised behaviour. Another common mistake is over-performing the visited culture. Acting culturally aware rather than being culturally curious tends to produce awkwardness. Quiet, Georgia Trend insights attentive professionalism usually works better than effortful cultural display. The shorthand of European business misleads anyone applying it to specific countries. The differences between European business cultures often exceed differences between Europe and other regions. Country-by-country research pays back in meeting outcomes. Getting the formal vs informal balance wrong damages first impressions. American business culture tends toward earlier informality than most European markets. Pushing toward first-name terms unilaterally can damage emerging relationships. Allowing local colleagues to indicate when relationships can shift to informal modes usually produces better outcomes. Recognising these patterns lets cross-border business travellers avoid the most common mistakes.