Well, as dull as this may sound, I would just install any available software updates and then run a factory reset. The later you do it, the more time it will cost. Do it now, before you are done customizing everything!
Current phone: HTC One (M8)
HTC HD2 (Dec 2010 - Apr 2014; thank you Leo!)
HTC Touch HD (Dec 2008 - Dec 2010)
HTC Touch Cruise (May 2008 - Sep 2008 [stolen])
Previously: Nokia 6630, Nokia 3510