@epassenglish Poisoning commands and spurious correlations are both super simple.
You poison a command when you give the command and follow it by something unpleasant. So if you said sit, then applied considerable pressure, the dog will start to associate the command sit with the unpleasant feeling that comes after it. It’s classical conditioning in the same way you can associate a marker with a reward (but it’s bad). To avoid this, you always apply the pressure before giving the command, so that their action (doing the command) is what turns the pressure off. Sequence is pressure->command-> desired behaviour -> pressure off.
Spurious correlations is similar, in that if you’re not clear about why they’re receiving a correction, they may associate that correction with something random in the environment (because you might be 50ft away so it’s not always obvious to the dog that it’s you). To avoid this, make sure you ask the dog to do something, if they don’t comply, say No (or whatever your punishing market is) then apply the correction. This way they understand the correction is coming from you, and not the random bird that flew by just before they got corrected.
Tone-tone-stim is basically just sending warning shots before a correction. Whether you want to take such an approach is up to you.
Hope this helps.