The digital preservation field is evolving rapidly. Focal areas are changing and best practices are still under debate. Preservation efforts must address not just preservation of the technologies of the past, but also those of the future. The rapidly increasing volume of data requiring preservation makes other digital preservation challenges inherently larger and more complex. The shorter lifespan of digital materials also makes the need for timely and effective preservation action more urgent. This article describes what the author sees as the current major challenges in digital preservation, and covers a range of technical, administrative, legal and logistical aspects.