Add equal volume water
Add equal volume (including the water) Phenol:Chloroform, vortex well
Spin for 10 min at 13.8K rpm (18K rcf)
Save supernatant in new tube
Add 10% volume 3M Sodium Acetate
Add 250% volume 100% EtOH, vortex well
Place in -20° for 30min
Spin for 30min
Discard supernatant
Re-suspend in 70% EtOH
Spin for 5 min
Suck off most of the supernatant, and dry in vacuum centrifuge (It is ok to let DNA dry completely)
Re-suspend in 30ul water