Best way to handle cancel / escape ??

Hello, what is the best way to handle a cancel in the beginning, middle or end of a form?

Is it best to save any data collected with VBA code in variables and write it all "afterUpdate" in the very last field. Or handle potential escapes or cancels while entering data in each field?

Not sure what is best because what I am doing is not working well and corrupting my Data.

If you can help please let me know and I will provide more data.

Thank you