Long story short, I educated him on how to keep financial records and record every single penny that comes in and goes out of his business. I also made him understand how this can help him cut losses and make more profit.
I have always wanted to organize something like a free seminar and educate the owners of small businesses in my community about this but I'm a very introverted and shy person so I don't know how to go about it, please I will appreciate ideas. Your friend probably doesn't know how to go about keeping records, or just laziness is his issue (it's good you talked to him about it; maybe you have just saved someone's ass). I had a female friend who was doing small-scale business; after she closes out her business, I will always ask her if she is done with her daily market analysis, and her response always is that "she's so tired and can't do any calculations at the moment". She was so lazy about it and cared less about it, but one day she came to me so angry, complaining that her capital was not even up to 60% of her initial capital. First, I was angry too because I had to blame her for not listening to my advice in the first place. Most times, some of these business folks may know the right thing to do to keep their business intact, but they just become less concerned because they feel so convinced that nothing is going to go wrong.
The main reason for keeping records in business is to know where your losses are coming from. If you don't keep records as a business person, you may incur losses that you can't explain.
Since you said you are an introvert, conducting the seminar may be challenging for you, and you will have to spend some cash to get a venue for the seminar. You will also need a projector and a microphone, and you will definitely spend very little or a lot of money to get the seminar done. If it is in my country, to hire a minimum event centre will cost you about $300 to $400, but a projector, microphone, and speakers will be made available.
My advice here is that you could just go to a cybercafé and prepare educational material on a paper of about four pages, depending on the level of education you want to pass on to them. Then, you can duplicate it for the number of people you intend to organize the seminar for, and then you can visit them and share the script with them, just telling them it's a guide to keeping good financial records of their business. Just my opinion.