They won't find a better undergraduate education. Serve as the contact person in your congregation or area to receive information and help keep others up to date. Be part of a network of alumni with a special willingness to promote Augustana. Make sure the counsellors in your neighborhood high school are aware of Augustana and the advantages it has to offer. Identify yourself as an alumnus.
Name recognition is important.
It's a great way to meet people and really saves the budget of the university. He wants to meet as many of you as possible in an informal way. Help out in the office e.g. searching for lost sheep, stuffing envelopes, phoning, etc. Serve as chair or co-chair for a class reunion. Give an Augustana student a chance to job shadow with you.