use FindBin;
use lib "$FindBin::Bin/../lib";
####
/path/to/my/bin/myscript.pl
/path/to/my/lib/Awesome.pm
####
use FindBin;
use lib "$FindBin::Bin/../lib";
####
use FindBin;
use lib "/path/to/my/bin/../lib";
####
use FindBin;
use lib "/path/to/my/lib";