Salary Problem

When anyone is under stress and feel frustrated what he/she is supposed to do? When he/she is working hard handling multiple jobs without any support system and not getting proper reimbursement for his/her services. Every time whenever boss seems some problem he assigns that job to that particular person and that men completes it but Boss do not say a word of appreciation and don’t make a comment about his/her salary. Any job which has to complete on urgent basis is given to that person and he/she completes it but appraisal is done for others. He/She think about a change but due to educational limitations he stops down. What step should be taken to make his career better. Should he/she start some business?

Please suggest the some ways.