Hey Friend,
F# Minor is the next chord we have in the key of D major. It's sandwiched between the E minor and the G chords, and acts as the IIIm chord for the key. F#M is a good chord to use if you want to build tension moving between the tonic D and the IV chord G. Of course, that's just one example of where you can use F#m.
Here's the chord progression again for D major:
I IIm IIIm IV V VIm VII° D Em F#m G A Bm C#°
F# minor is constructed using the notes F#, A and C#. The notes come from the key of F#. This is the key with the F# major notes highlighted:
1 2 3 4 5 6 7
F# G# A# B C# D# E#
You may notice the E# above - this is actually an F note. In order to keep the keys from getting confusing, you don't repeat a note letter when writing out a scale.
Because the chord is minor, you flatten the 3 note so it becomes F# A C#.
I'll have some more stuff for you tomorrow - including the exercise files. I apologize - I'm a bit spacey today. Can't seem to get my thoughts straightened out...
Peace~
Dave | 
