42. Working part-time

Of course, this won’t be cut out of the list. If you happen to need more source of income, one of the best ways is to get a part-time job. You can work for an industry that’s different than the industry you are working in now or work in the same industry but different companies. You just need to make sure that there won’t be a conflict of interest between your two jobs, if you do go for jobs within the same industry.