What’s the best way to clean and prepare a dataset or data set for analysis? or How do you handle mis

Oh man, horror story time: Once spent 3 hours fixing dates because the dataset or data set had mixed formats (MM/DD/YYYY and DD-MM-YYYY). Never again.

Now I always:
- Check column formats first.
- Use pandas’ `to_datetime()` for dates.
- Validate categorical values (like making sure "USA" and "U.S.A" aren’t separate categories).

For tools, Python’s great, but if you want clicky stuff, Trifacta Wrangler is pretty neat.