This may be obvious, but I want to add that you should skip if you are injured. Noting that being sore from a previous workout is not the same as an injury. Also, if you are significantly sleep deprived it may be worth skipping, since you won’t be adequately recovered and that could also lead to injury. You will miss more days if you make an injury worse than if you play it safe and take time to heal. A day or two missed won’t ruin all your progress. Just don’t make up excuses.