What skills do you find useful to have learned?

I mean skills that you were grateful to have learned in certain situations. Especially what has given you an advantage in everyday life, at school or at work. From communication/psychology and languages, to stock knowledge, learning chess, to banal things like being able to read quickly or do mental arithmetic, etc. Simply anything that seems…

Cheap activities in Frankfurt?

Hello everyone! ๐Ÿ™Œ๐Ÿป I'm currently on ten days off in Frankfurt, but unfortunately I'm short on money…๐Ÿ’ฒ๐Ÿ’ฒ So, could you suggest some fun activities in Frankfurt for fun ๐Ÿฅณ or self-development ๐Ÿ“? It could be visiting a museum, walking in a park, or enjoying a historical siteโ€”anything fits! Thanks for the comments. ๐Ÿ™๐Ÿป (Please state…