If you are at a computer or with your phone whenever you are up in your chair, consider downloading a repeat timer application.

On my phone, https://itunes.apple.com/us/app/repe...481226913?mt=8 (definitely worth the money over the free version)
On windows, http://dan.hersam.com/software/snaptimer/ (options - always on top, minimize, auto start, auto restart, auto save)
On mac, http://www.apimac.com/mac/timer/

SO NICE!!!!!!!!!!!!!!!!