Computer simulation primarily. It is a direction that I see most probably because it is the direction that life seems to be taking me. I talked to a guy the other day in p-chem that said he never even touched a pipette during his PhD. His dissertation was entirely computational. With computer costs going down and power going up so quickly, simulation is getting to be a very cheap option to test lots of things before spending the money to actually try them. Computer simulation is a great skill to pick up. No matter where you learn it (I learned through physics), you can apply it in lots of contexts.