Increasing Mash Efficiencies

TroubleShooting

Tim Jennings - Chicago, Illinois asks,

I am looking for ideas to help me get more yield from a batch of my homebrew. I figure the time spent for mashing (I brew all-grain), fermentation, racking and packaging all take about the same amount of time whether I net 5 gallons (19 L) of beer or 4 gallons (15 L). My problem is that I never get anywhere close to 5 gallons (19 L).