There are some good references out there ...
From this site, try the "From Camera To Print" video tutorial.
There's also "Real World Camera Raw" ... although you're using LR, the basic concepts are the same. I believe there'll be a new version before long (written by Jeff Schewe) that covers ACR version 4.
In terms of trying to mimic the look and feel of your existing film scans, a good start would be tweaking the tone curve (e.g., to get higher contrast), boosting the vibrance slider, and also adjusting the individual color sliders in the HSL section (hue, saturation, luminance).