The success of any geosteering process is determined at the planning stage. This article will present the most crucial aspects of well planning which directly impact the effectiveness and efficiency of the geosteering process while drilling. These critical matters, often overlooked or omitted during planning, have a significant effect on the process as their negative impact cannot be mitigated or reversed while drilling. Thus, if not taken into account during the planning stage, they will condemn the well to failure before the geosteering process has even commenced. The article proposes an introduction of a new crucial step in the well delivery process, a Geosteer Well On Paper™ (GWOP) exercise during which all the required steering activity’s due diligence should take place.