Thats almost a personal preference. The basics are trim fan leaves and as much stem as possible. The great big stereotypical marijuana leaves. After those smaller leaves with little to no trichromes. Then smaller leaves that are covered with trichromes if you want or leave them on. Some people trim while in a pot, some cut off a branch at a time. Some cut the whole plant down. Basically start from the biggest leaves. How you will dry decides how much you chop buds and stems. If,you hang branches they just cut the plant into manageable pieces. If,you dry on screens then cutting buds off the branches.