1. Think of the major scale (not the relative major just the major of that key) on the way up and flatten the 3rd. On the way down play the key as its written (or think about the relative major scale and play that)
2. Think of the key signature and raise the 6th and 7th on the way up and then flatten the 6th and 7th on the way down)
3. Go by the sound and work out the intervals as you go
I know I'll get it eventually but it just seems that I really have to think about the key signature on these rather then getting used to the 'feel' of each scale because they differ going up and down.
Basically, some tips on harmonic minors please!