Tip #3: Commitment

This is more for anyone thinking of being a nanny than anyone who already is. Anyone who has the job now knows from experience: it's a HUGE commitment.
You are in charge of someone's child. You commit to teach good behavior both by actual teaching but also modeling it. For however many hours a week, you are basically a parent. And just like a parent, you will reap the consequences of any mistakes you make. (Only there are also two "other" parents that have to approve this parenting style!) You have to be consistent, patient, flexible, observant, and did I mention patient? Not having children of my own, I can't say if it's more frustrating to deal with other people's children or your own. But as far as I can see, there are pros and cons to both. You have total freedom with your own, and there maybe isn't as much at stake if you do mess up. But with other people's kids, you can give them back most times and if nothing else, look forward to quitting time! :)
You are also committing your time. It depends on what the parents do as to how big of a commitment is required. I work for two doctors. That means I don't have even one parent with a consistent schedule, so it can be VERY hard to make plans. In a lot of ways I got lucky that they had a second child. With the mom being off work for nine months (she took a leave of absence when she experienced problems), I was able to take two vacations and work slightly better hours (40-45). Now she is back at work. Life is awful for all of us, except maybe the kids. :)
Example: I am in day 10 of a 12-day stretch. They asked me at 6:40 Friday morning if I could go out of town with them for the weekend. I said yes; probably shouldn't have. I had casual plans with a friend and canceled, hurting her feelings, and I feel very bad about it. (When I learn how to balance commitments, I'll let you know.) But I went. So I was working alllllll weekend, till Sunday afternoon. It was nice just to get out of town, and we went to the beach. It rained most of the weekend, but we were in a condo and could look at the waves from the balcony.
But I didn't get even one tiny break to go take a walk on my own. Should I have asked for one? Probably. There is a different between total commitment and getting walked on. But going back to being positive, I didn't and I'm going to enjoy pretty much what I got. They did take us all to dinner. (A late, dressy one, and the girls did FANTASTIC! Go me!)
Then we came back and yesterday, I worked 7:15-6:40. It was a long day. But...they're doctors. They got stuck and there was no way around it. I almost didn't make visitation at church, but I ran straight there after work. I was close enough that I was only 10 minutes late, and had called to let them know. I didn't make it home till almost 9 pm because my mom needed me to stop at the store. It can be hard to run a life on the side.
So just a friendly warning...think about what you're about to do. Make sure you can handle what you're about to take on.