My takeaway from the Online Permaculture Design Course this week is the use of guilds. Guilds are groups of plants and/or animals that work together. Often, a guild contains a central element such as a specific tree and then other elements are gathered around it to assist the central plant or animal. The goal is to assemble components that help each other in some way. The more ways components help each other, the more likely the guild will work out. Look for large numbers of connections between elements.