When learning out of clan disciplines please keep in mind that this is a serious exchange and commitment, not to be undertaken lightly.
To start the mystical process of assimilating a new out-of-clan Discipline, the learning vampire must drink a point of blood from someone who possesses the desired discipline in-clan (the teacher) before instruction can begin. This will create a Blood Bond of the appropriate level (for those subject to the Vinculum, it will result in an increase of your vinculum rating toward the vampire in question).
Learning out of clan disciplines takes an additional week longer per level than learning a normal discipline, given the time needed to assimilate the knowledge contained in the domitor's blood.
A notable exception to this is the three physical disciplines, Celerity, Fortitude and Potence. They can be learned without finding a teacher, and require no Blood Bond to develop. However, if developed in this fashion, they cannot be raised above the third dot. They will be subject to out-of-clan costs and learn times, however.
Finally, in order to teach a new discipline to someone, your character must have a level higher than the level she is trying to teach. For example, if the student wishes to learn Obfuscate 2, the teacher must possess Obfuscate 3 in order to instruct. Additionally, out-of-clan disciplines cannot be taught. Caitiff/Panders treat all disciplines as out-of-clan.