Battery conditioning starts the moment you take it out of the box. For best results, don't turn it on. Plug it straight into charge and let it fully charge then leave it on charge for about an hour extra. Turn it on and use it as much as you want, just make sure it stays powered on, but keep it off charging until it is completely flat.
Once it shuts itself off (due to zero battery), then put it on charge again. Leave it on charge (you can use it while this happens, but I recommend not doing so) until it's fully charged and leave it on charge for another hour after that.
At this point, take it off charge and you can start using it like you usually would. You can do another cycle if you want or you can just try and charge it only when it gets very low for the first week or so.
For those who are curious: battery conditioning relates to how the battery's charge pattern is determined. Most batteries will have a "memory" which may cause the battery to only charge to a certain level or only discharge some of its theoretical capacity. The conditioning cycle pushes the battery's charge limits to the actual capacity of the battery to get a longer lasting charge. With each new generation of batteries in newer devices, conditioning is getting less important as batteries get more sophisticated, but I've still always had better results from conditioned batteries compared to ones I've used out-of-the-box. Note that this process can only happen during the very first few charge cycles. Conditioning a 1-year-old battery will do almost nothing, unfortunately.
