Implementing Enterprise Architecture (EA) in modern enterprises presents complex challenges and necessitates adherence to best practices to ensure successful outcomes. One primary challenge is securing business buy-in; without the commitment of key stakeholders, EA initiatives often lose momentum and fail to align with organizational objectives. Additionally, the absence of clear leadership and vision can impede the long-term success of EA projects, as they require sustained strategic direction to navigate the tensions between immediate business needs and overarching architectural goals. The selection of appropriate tools is another critical factor; employing inadequate or misaligned tools can hinder the transformation from legacy systems to agile, cloud-based solutions. Several best practices have been identified to address these challenges, including developing robust EA strategies that align IT infrastructure with business goals, adopting API-centric architectures for enhanced system connectivity, establishing effective governance structures, and implementing iterative approaches that deliver incremental value. The WARP framework and PSLIMS methodology offer structured approaches that have proven effective in contemporary business environments.