  Statistical observations of the Epoch of Reionization using the 21 cm line of
neutral hydrogen have the potential to revolutionize our understanding of
structure formation and the first luminous objects. However, these observations
are complicated by a host of strong foreground sources. Several foreground
removal techniques have been proposed in the literature, and it has been
assumed that these would be used in combination to reveal the Epoch of
Reionization (EOR) signal. By studying the characteristic subtraction errors of
the proposed foreground removal techniques, we identify an additional
subtraction stage that can further reduce the EOR foreground contamination, and
study the interactions between the foreground removal algorithms. This enables
us to outline a comprehensive foreground removal strategy that incorporates all
previously proposed subtraction techniques. Using this foreground removal
framework and the characteristic subtraction errors, we discuss the
complementarity of different foreground removal techniques and the implications
for array design and the analysis of EOR data.
