Gus used to be a nipper. My youngest son bursting into tears and Gus being banished to his cage with no attention seemed to get the message across it wasn't okay to nip. We tried pinning him, but it just seemed to escalate the tension. Putting him in a bunny "time out" worked well for him. (It works well whenever he's misbehaving, actually!) Buthe lovesbeing out of his cage and being allowed to be with his "people." So that may not work well for a bunny who likes hiscage better.
If your rabbit is nipping to be put down, you can't let her win. Wear some padded clothing and gloves if necessary, wrap her in a towel or blanket and practice holding her--not for very long. Only a few moments, then put her down. If you can successfully pick her up and put her down before she nips (or kicks) enough times, she'll learn that being held isn't bad. If shenips or starts kicking, you need to hold her till she stops. It can be a challenge if she's learnednipping and kicking means she gets put down. But once she learns that you can't be bossed around, she'll stop.
Hope that helps!