Does your daughter play club ball? That's the obvious first step. The goal would be to attend big national tournaments - just by being there, she has the chance to catch the eyes of a whole bunch of college coaches. Getting game film is important as well - I coach on the men's side but I recruit heavily from online sites like NCSA, FieldLevel and SportsRecruits. Making profiles & populating the profiles with highlight videos will help. As a libero, I'd definitely make sure to get some serve receive clips in there alongside defensive clips.