Skip the line
There is no way to avoid lines at the airport. You go on them when you arrive and when you leave. But there are some tricks to go through them a little faster. You should be looking for the left line.
Why should you go to the lines on the left? Most people gravitate to the side of their dominant hand, so the right side is more congested. That trick will most likely work when lines are being formed. If not, always look for the lines with fewer families on them.