As for practical lessons one can learn from watching this episode, I would argue that one of those would be to prepare for the eventuality that all your plans can go to Hell at a moment's notice. Be ready to adapt on-the-fly. In the world of the TV show, this took the form of their vehicle becoming disabled, followed by crashing and eventually burning, but this type of problem can manifest itself in any one of a million different forms. It's pointless to get hung up on every eventuality... simply train yourself to be ready to adapt to whatever may come.
Other lessons presented here include the necessity of training every individual to be able to, at minimum, defend themselves. There is no doubt that, in the event you or I find ourselves in a much more dangerous TEOTWAWKI type of situation, there will be people who require our protection, such as significant others, children, elderly family, etc. But, aside from that, people have to be able to take care of themselves. You simply cannot spend all of your time protecting someone who has no excuse for being weak, other than that they are a weakling. Everyone will need to tow their own proverbial line, because there won't be a lot of room in a societal collapse / apocalyptic type of setting for people who are nothing more than dead weight.
And, with that same sentiment in mind, I would advise everyone that now is the time for each of us to be learning skills that will make us more useful to a group if those sort of dark days do occur in our future. When actual survival is at stake, the skillset that will keep you alive and make you someone that other people want to have around may very well not be the same skillset you are adept at right now. There isn't going to be a lot of call for accountants and grocery store clerks in a harsher world. But even an accountant or grocery store clerk can take the time now to learn woodland survival skills, first aid, gardening, archery and/or shooting. You can even take it upon yourself to become an EMT. It's up to you what you decide to do. But learning skills and attaining knowledge that make your existence valuable will do nothing but help you.
Lastly, the final lesson presented by episode five is the reality that even otherwise decent people may come to find brutality gets easier and easier for them in a world where every day is a fight for survival. As the character Abraham stated, you get to the point where most of the weaker people are gone and everyone who is alive is strong, many of them threats to you and your people. That is just a fact. Mankind is a rough animal, and when the hold of law and order is no longer present and the thin veneer of polite society is ripped away, many people will reveal themselves to be no better than common predators. The goal will be to maintain our own humanity as we are forced to deal with such people.
The Walking Dead: The Complete First Season [Blu-ray] --- [DVD]
The Walking Dead: The Complete Second Season [Blu-ray] --- [DVD]
The Walking Dead: The Complete Third Season [Blu-ray] --- [DVD]
The Walking Dead: The Complete Fourth Season [Blu-ray] --- [DVD]
My previous reviews for this series can be accessed by clicking the links below: