I have a large set of samples to extract DNA from, and am trying to plan out the most efficient way to process them. I have a few options, but the most efficienct would be to first process all of my samples through the extraction and proteinase steps on day 1, store them overnight at 4C, then finish with the cleanup steps on day 2. I'm extracting in 4% SDS with 50mM EDTA, 500mM NaCL, and buffered to pH 8 with 50mM Tris. I use a bead beating step, followed by 15 min 70C incubation, then treat the supernatant with proteinase at 56C for 20 min.