3. Exploit Relatives
By this heading I mean the relatives you have that are either really young or really old. Most parents are very good at preserving the secrecy of gifts - they have experienced it all before as children, know every trick in the book, are quite efficient technogically, and are not people you want anger close to Christmas. Therefore it is easier and often more profitable to exploit your younger siblings. If yours are easy to manipulate, they may still have enough of a "cute factor" in order to convince your parents to tell them what your presents are, and the little ones can be bought with something as simple as a lollipop. However, the issue with the little children is their fickle nature, and the fact that they don't understand much until they reach the age of about eight, so it is not often successful to get an intelligence response out of them. In which case, the next option is your elder relatives. They are senile, slow-witted, and their only remaining faculty is to provide you with whatever you want. Whilst they may have enough brain power left in order to try and hide any knowledge of what the presents are, but this can usually be navigated by obsessive pleading or possibly pretending to be somebody else, depending on how capable your grandparents may be.