the only thing I can think of to say about slit lamp and phoropters... practice practice practice. everybody does it a little differently. Every school teaches a different way to refract. So, I'm afraid I wouldn't be much help there.
Slit lamp is just watch someone and soak up everything they're doing. Ask LOTS of questions.. where should the housing go, in or out of click stop, how big the beam is (paralellpiped, optic section, conic section, etc), when to use each kind of illumination. There are lots of OD prodedures texts out there that deal with this. But, I find it best to learn by watching others. Kind of like the MD see one, do one,teach one. I lean better that way.
Good luck! let us know how it goes.