Guideline #30: Don't sell the little piece before you sell the big piece.
Real estate often has various components. A five acre lot can easily be divided and sold from an 80 acre farm that has a decent amount of road frontage. The fixtures, equipment, and licences can easily be sold from a closed restaurant or bar. The timber can easily be sold off of a wooded tract of land. And so on.
Peoples' needs and motivations vary, so this is not a "never do," but it is a "really think hard about it" type of guideline. There are times when it makes sense to sell a small piece to protect the big whole. But, more often than not, "cherry picking," or selling the small piece at a good price, seems to negatively impact the value of the remainder. Diminish the value of the remainder enough and you devalue the entire investment.
Think it through.