Life in Balance and Credit

I had a dinner with my relatives yesterday. Everything was as usual till Jane, my 12-year old niece asked me: How to establish credit and not to get into debt? Well, the answer seems to be easy at the first sight: just obtain a credit card and use it wisely. Then Jane asked what means to use credit card wisely. Everyone started to name different things. The rules seemed to be innumerous. So, Jane said that it is too difficult and an ordinary person will never be able to remember all these tips.
So, we decided to browse the Internet to find out how to build credit and not to get into mess.
Here are the main 4 tips:
• Pay all you bills on time and in full every months.
• Never exceed credit limit.
• Do not buy on your plastic more things that you need. Keep track of your spendings.
• Do not hold lots of credit cards. Every credit card means debt. The more credit cards you have the more you owe credit companies.
Jane thinks these tips are easy enough and following these rules everyone can establish good credit without any problems. Do you agree?