This year at CodeRage 2018 I presented a session on Creative Delphi Debugging Techniques.
Other than my speaking volume being a bit quiet, it generated a number of very nice comments about the subjects covered so I thought it might be useful to mention that it is available for on-demand viewing as part of the CodeRage 2018 Replay.
There is free enrolment in the conference replay and my session, along with the session slides and sample files, can be found here.
If you watch it I hope you turn up your PC volume and get a lot out of it to hopefully help with your debugging exercises!