There are a handful of ways to minimize voltage drop. First, minimize wire length wherever possible. This might mean running wire through a wall, or a ceiling, instead of going around a room - if possible.
Second, make sure to use an adequately sized wire when making runs between your power source and the light strip.
Third, is to minimize LED strip run length. The simplest way to do this is to split your run into two sections. As an example, say that you require thirty feet of the strip to light up a room. Rather than one long thirty-foot run, we would recommend placing your power supply in the middle and then splitting them.