1. A computer-implemented method for managing manual entries of blood glucose measures for a patient in relation to a structured collection procedure administered by a portable computing device, comprising: managing, by the computing device, a structured collection procedure for a user of the computing device, where the structured collection procedure specifies one or more collection events for obtaining blood glucose measures for a patient; receiving, by the computing device, a data entry from the user of the computing device, where the data entry includes a blood glucose measure and a time at which the blood glucose measure was taken; evaluating the data entry in relation to the structured collection procedure using a membership rule set, where the membership rule set defines rules for associating data entries with structured collection procedures; and inputting the data entry into a logbook residing in a data store on the computing device.