Probably going to need to be more specific to get a lot of responses.
However, I did turn off Google Now and associated locations services like "Enable Location Sharing" and "Enable Location History". These seem to make a decent difference on the Maps usage.
I gotta be honest though. I was concerned about battery life when I bought this thing, being a previous Thunderbolt and Galaxy Nexus owner. It's more than okay. I was off the charger for 35 hours yesterday with 25 percent left. I had light usage over the weekend, so it's not typical, but I've never gone a day where I had to charge before bedtime. I think it's gotten better over the couple of weeks I've had it.
Question Authentication error while connecting to your email provider
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