1. Use as few tags as possible.

2. Limit yourself to a self-defined set of tags.

3. Tags within your set must not overlap.

4. By convention, tags are in plural.

5. Tags are lower-case.

6. Tags are single words.

7. Keep tags on a general level.

8. Omit tags that are obvious.

9. Use one tag language.

10. Explain your tags.

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