You can use business rules / content rules defined on a share / folder base within the explorer. These can be applied on all to specific content you're uploading and can be as simple as adding an aspect, moving to a specific location, extracting certain data to running a custom script automatically during the upload based on the condition(s) fulfilled. These rules can currently not be maintained / created from within Share.
To define a new rule navigate to the container / folder in the explorer (localhost:8080/alfresco) e.g. as admin and then selecting [More Actions][Manage Content Rules] - there's a wizard guiding you through the creation of a new rule. Scripts can be put into the Data Dictionary for use here.
Hint: When extracting meta data specific for an aspect also use the action "Extract common metadata fields from content" to extract that data after the rule for the aspect has been applied (the general meta data extraction would otherwise only run before the rule for the aspects is applied)
fpp