as far as tips, do some controlled tests with water, your normal boil volumes and times, and see how much you truly lose.
It'll be useful info in the future, especially for all grain brewing, where the goal is NO top-off water and a full-boil that ends up about 5.5gallons.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10