As we already have a lot of related answers to similar questions, just let me sum up here:
As said in my above comment, the screenshot does not provide much information without having related details available. All it says is: The overall battery consumption after ~14.5 hours is shared 50:50 by "Phone Idle" and "Cell Standby". Let's assume the battery level at that point is 80%, then each app had consumed about 10% of a full charge -- which could count as "normal". If on the other hand the battery level was 20% (or even less), it would be a bad sign -- pointing a.o. to bad reception (see: What is Cell standby and how can I keep it from eating my battery?) for the "Cell Standby" part.
I wrote we already have a lot of good answers on the "battery life" topic. Some are even listed in the "Related" (and now also in the "Linked") section of this question, as e.g.
Many more can be found following the tag-link battery-life. Please follow those links for closer information.
As the "battery info" is giving you so few information, here's a hint to some helpful app: BetterBatteryStats. With that app, watch out especially for the "Wake Locks", as those keep your device from entering energy-saving modes. Check the configuration of the apps mentioned in connection with this (a good example could be an email app with a too-high polling frequency, where you e.g. could reduce the frequency from "every 5 minutes" to "every 30 minutes" to save a lot of juice).
EDIT: Another helpful app I just discovered is Battery Stats Plus, which helps you find the "evil apps" on your device. Brought to you by our friend at XDA Developers...