1. A system configured to determine a future disease control parameter value comprising: a recording device configured to record a prior disease control parameter value; a processor unit configured to communicate with the recording unit; and a memory comprising (i) an optimal disease control parameter value, (ii) one or more optimal self-care values, (iii) one or more scaling factors for weighting an impact of one or more self-care actions by the patient on a disease control parameter value of the patient and (iv) one or more actual self-care values of the patient, wherein the memory is readable by the processor unit and the processor unit is configured to calculate the future disease control parameter value based upon (i) the optimal disease control parameter value, (ii) the one or more optimal self-care values, (iii) the one or more scaling factors, (iv) the one or more actual self-care values of a patient and (v) the prior disease control parameter value.