It doesn't hurt to keep working on the bounce rate (obviously), but that may or may not be a really good number. A lot of it depends on how broad your site niche is. For example, if you have a site on photography in general you would likely have a very high bounce rate because some people might get there looking for reviews, some might want information about wedding photography, etc.
Bounce rate just means they only looked at one page. So if your page is fairly long or complete with the information they wanted they achieved their purpose. Also, if your landing page is basically a sales page it is very likely that a lot of people would only look at that one page.
But if you had a site on using the Nikon D200 camera and short pages describing how to use each of the features people would rarely find it unless they typed in that camera model you would likely have a good bounce rate.
In truth, I suspect that many people here would consider your bounce rate to be quite good.