The increasing use of digital techniques for researching both analogue and digital texts, archival sources and data clouds requires a new research methodology in which traditional knowledge is closely interwoven with digital skills. In this tutorial, an interdisciplinary team of political historians and information scientists from the Huygens Institute will use case studies from their research to provide insight into this current methodological discussion and to more practically discuss ways to find, criticize, contextualize, and finally prepare such complex sources to use them for research. To prepare for the tutorial, you are requested to write a text in which you describe the digital and ‘paper’ sources you use in your research and reflect on the advantages and disadvantages of using them. During the tutorial, there will be ample time to interactively discuss the problems you and your fellow PhDs experience and to create awareness for alternative sources to work around the problems you face.