The old adage is shooters shoot. That is the only way for them to get out of cold streaks.
They could try to attack and get to the line to get some confidence and get a free throw to build confidence. But, at the end of the day, the only way for a shooter to get on a roll is to keep shooting and to work to get an open shot to build confidence.
Evan Fournier was confident throughout the entire FIBA World Cup. He was coming around screens from Rudy Gobert and finding space to get into his shot.