[germb747]

You're preparing for the FAA Instrument Rating right? Get ahold of the "Oral Exam Guide" at the local pilot shop and read through it a few times. Also, King Schools puts out good videos that show a mock oral/practical. Those two things covered everything I was asked on my IFR oral, don't worry about any of the Part 121 crap. You can take off 0-0 if you want to. You can shoot an approach 0-0 if you want to as well, for that matter.

It's been 10 years since I took my initial instrument training, but definitely know stuff like when is an alternate required for Part 91; what qualifies as an alternate. Know all the Part 91 IFR regs cold, equipment required for IFR, etc. Read up on what you need to continue below minimums and land, (i.e. what constitutes having the runway environment in sight, what can you do if you only have the approach lights in sight (go 100ft below mins), what visibility do you need, be in a safe position to make a normal landing, etc.)

Good luck!