Use quick masks FOR selections
Using the shortcut Q and entering Quick Mask Mode, I will often paint in the areas with a brush that I want. What is great about this is the ability to use custom brushes, the Lasso Tool/magic Wand Tool to help with painting, and a tap of the shortcut X to switch between painting/erasing. Note that I have everything I want selected painted in red by doubleclicking on the Quick Mask icon. I used this a lot to get selections of unwanted wires and then used the Content-aware tool to stamp them out quickly.