Small, new or foreign firms inherently have a lower likelihood of surviving in the market. Frequently, this is due to the existence of resource constraints, such as the liabilities of smallness, newness or foreignness. Consequently, to survive in the market, small, new or foreign firms need to find efficient ways to use their resources. Multiple ways to alleviate these problems have been discussed in the literature, which include digitalization, internationalization, or outsourcing relationships. The usage of digital technologies, entering foreign markets or partnering with established organizations have been found to have compelling advantages and, thus, are promising practices for small, new and foreign firms in overcoming those constraints. It is, however, surprising that little is known about relevant aspects of these practices. For instance, research has just begun to investigate the influence of digital technologies on small and new firms, misses to investigate the success factors in the internationalization of small, new and foreign e-commerce firms, or has not fully investigated methods to improve performance of small firms in outsourcing relationships. Drawing on extant research on digitalization, internationalization, and outsourcing this cumulative dissertation presents four research papers. Each paper contributes to fill existing research gaps in the respective literature. All papers investigate a particular type of small firm and examine potential ways to handle scare resources. Beyond the theoretical and practical contributions of each research paper, this dissertation in its entirety presents several implications for practitioners in small, new and foreign firms that will help them to overcome resource constraints. Furthermore, the thesis discusses implications for theory, limitations, and avenues for further research.