Two things that have held me in good stead i think.
Application form/Olpas stage: Write eveything in bullet points, unless they actually ask for e.g. ‘500 words on subject X’.
Interview stage: Force yourself to take a deep(ish) breath before every answer and then phrase answers in a non-committal way - i.e. ‘i can understand why you migh take approach x, but if i were counsel for the claimant, i see the force in doing y’. If youre interviewing at a chambers that does criminal/human rights/employment, discrimination - things like that - then dont be non-committal, be quite forceful in arguing for the defendant, terrorist, member of a ‘protected group’ etc. - because theyre usually the easier arguments to make and you’d be considered too much of a fence-sitter if you couldnt muster up an argument for that/their side.
ok, thats more than two things i guess, but whatever. and theyre not secrets i guess, but there we are.