Having been through the recruiting process twice D1 and D3 here is my take on the attributes coaches are looking for:

1) Grades. If you have a 2.5 GPA your options at the top tier D1 schools are severely limited.
2) Stick skills and Lacrosse IQ - the latter is tough to teach
3) Size/Speed - better have one or the other
4) Attitude - if your kid is a hard worker on the field - ground balls, doesn't give up, doesn't whine - it makes a real difference. No one wants a cancer in their locker room

Identify the schools you kid is interested in and engage their coaching staff - that is how you get recruited - at least that was my experience