How can individuals apply Kantian ethics in real life situations, such as deciding whether to tell the truth or lie, or determining the moral implications of their actions?

Individuals can apply Kantian ethics in real life by following the principle of treating others as ends in themselves, rather than as means to an end. This means always telling the truth, even if it may be difficult or inconvenient, and considering the moral implications of their actions by asking if they would want everyone to act the same way in a similar situation.