Sure - go out, plug a bomber cam and peel off a roof into space. When the gear holds her repeated falls it will help her mental game. If the gear rips - well if her gear isn't atomic she should be asking advice on how to place good gear and not conquer roofs.
Once she whips a bunch of times and realizes there is no consequence she can focus on her climbing and not her falling.
OK maybe that's a bit too general - but I do feel that getting stronger mentally comes easier than getting stronger physically.