I've never written any unit tests for any apps/programs I've developed.

I would tell myself, this time you're going to create some and be a better developer by doing so. I end up just creating the file and that's it.

Most of the bugs are discovered during the user testing phase so I always end up being lazy writing unit tests.

I write very defensive code though so that helps a little but all in all, it's a very bad habit that I need to snap out of