On SCDigest, I wrote an article about the 5 models you should build in 2013.  These are simple models meant to get you started and add value.  Here is the list, but see the SCDigest article for more detail.

#1.  Plot your demand on a map

#2.  Add the current lanes you are using to serve your customers

#3.  Reassign customer territories

#4.  Model what would happen if you lost a warehouse

#5.  Model a single product