While on a conference call, I forgot to mute my microphone and more than 200 people could hear my gummi bear plastic wrapper rustling.the rustling noises from the plastic wrapping of my gummy bears. While on a conference call, I forgot to mute my microphone and more than 200 people could hear the rustling noises from the plastic wrapping of my gummy bears.

I own upadmit, I'm a bit of a stickler for good, grammatical emails. I admit, I'm a bit of a stickler for good, grammatical emails.

'I admit' makes more sense and sounds better to me in this context.

I own up, I'madmit that I could be a bit of a stickler for good,when it comes to grammatically correct emails. I admit that I could be a bit of a stickler when it comes to grammatically correct emails.

Don't be deterred by thea dressing-down ofrom your boss. Don't be deterred by a dressing-down from your boss.

You receive a 'dressing-down' from someone. Unless you meant that the boss was the one who was being told off?

Don't be deterred by the dressing-down of your bosyour boss' criticisms. Don't be deterred by your boss' criticisms.