Perform the float test with your sourdough starter before you prepare the dough. Drop a spoonful of starter into a cup of water, if it floats it is ready to use.
Use quality flour and untreated water. At least make sure the flour is unbleached. Organic flour is preferable.
Watch the dough, not the clock. When the dough is rising, be patient. Give it as much time as it needs to double in size before shaping.
Use a glass bowl or clear plastic baking bucket so you can see the dough as it rises and observe air bubbles and whether or not it has doubled in size.
Use a very sharp knife when slicing your bread, I use this bread knife which cuts sourdough like butter.
Use steam in your oven which is the best way to achieve a nice, crisp crust that is not burnt. Place a pan of hot water on the bottom rack of the oven while the bread bakes.
Make French Toast! Mix up a few eggs, milk, vanilla extract, and a tablespoon of brown sugar in a large bowl. Dip slices of the sourdough blueberry lemon bread in the egg mixture and cook on a griddle or in a skillet until browned. Serve with butter, maple syrup, and powdered sugar.