Devices to help me more active in office.

I often find myself sitting too long and too much without any breaks during my work and I think that's one of the reasons for my tendency of diabetes and this also brings me a lot of other problems like back pain and neck strain. Self-awareness to be more active is pretty difficult as I often forget to stand up and move more. So I consider buying a device that can monitor me to do it more, then I found this cool product called Darma Smart Cushion (their website www.darma.co). Is there anyone here used it before? Is there any other suggestions or products you'd recommend? Many thanks.