When discussing performance with colleagues, teaching, sending a bug report or searching for guidance on mailing lists and here on Stack Overflow, a reproducible example is often asked and always helpful.

What are your tips for creating an excellent example?

How do you paste data structures from r in a text format?

What other information should you include?

Are there other tricks in addition to using dput(), dump() or structure()?

When should you include library() or require() statements?

Which reserved words should one avoid, in addition to c, df, data, etc?

How does one make a great r reproducible example?