What are the most important skills you think everyone should learn in their lifetime?

Objective knowledge and relationships with others are the two things you take with you. Both of these are there for useful to acquire during each lifetime.

Sometimes people will show an extraordinary talent for something in childhood, such as music or math. This can be simply because they had already mastered these things in one or more previous incarnations. Likewise, sometimes two people meet and immediately form lifelong relationships, feeling as though they’ve known each other forever—and they my well be right, as they may simply be rekindling relationships they’ve had for many lifetimes together.