You must select a good PIN that is not easy to predict. At the same time, it is crucial that you easily remember or recollect the PIN. Avoid repeating the numbers or using a sequence that one can guess easily. Additionally, ensure that you avoid numbers that can be easily accessed. These numbers include your date of birth, anniversary date, mobile number, licence plate number, Aadhaar Card number, etc. You can even use a random number generator to get a unique PIN that is difficult to predict. Moreover, you must use a new PIN for different credit and debit cards.