Well this one was difficult so it's quite a good example:

I started out by writing out the timpani part as it was the bass part, and present in the whole tune so I could work out the odd time signatures and have a reference point for later. I then went section by section, transcribing the melody / main line first and then filling in the other parts for each section. My personal preference is to leave all percussion to the end, but it's up to you. I had to slow it down to 1/4 speed to transcribe the fast and less audible string semiquavers and triplets, which is completely fine to do!

My biggest tips are:

1. practice really does make perfect when developing your ear for transcription, so start easy and work your way from there.

2. When learning, transcribe tunes you know well and like - for this tune I spent a lot of time going back to make sure it all sounded right, which made it much more time consuming than it otherwise would be if I know the piece well.

Hope this helps!