Hey, Ive just finished the RG course also and am delighted to hear that you are hoping to launch another audio course in March. Das ist Erstaunlich!! About time too you bunch of slackers! (Ich mache nur spaß!) Die Nuance und die Einstellung/Haltung(?) sind sehr klug. Sehr amüsant!
If you are asking for ideas (not that you are likely to listen to me NOW, although I feel I have softened the blow with some warm fuzzies), but how about a converstion at the breakfast/lunch table and/or reflecting on some recent events to get used to past tenses. I've also seen some stuff on subjunctive - is that useful? And man, do I need some practice with ihn, ihnen, ihr, ihre, ihren, ihrem, ihres, ihrer let alone euer etc.! It's a nightmare! However, I have to admit that I haven't done the 7.2 Part 2 grammar lesson yet so I'm being totally unfair here.
Another possibility is a reunion of some sort, or maybe a romantic soiree?
Sowieso, es freut mich das es gibt einen anderen Teil zu Rocket German! (I wonder how many mistakes in that colossal sentence!)