I particularly don't believe in routine, but what works for me doesn't necessarily mean anything to the guy next to me. I'd imagine that so long as you don't practice the same thing or the same way over and over you'd be good, but keep things fresh. Last time I checked guitar wasn't a job so I'd mostly just suggest to not treat it like one. I guess I'd suggest to play when you feel like playing. Sometimes it feels nice to break away from the hum drum world of practice to just let loose and jam aimlessly from time to time without a care as to who or what hears. And finally, on others' practice routines. I'm personally not sure that the amount of time someone else plays would really matter as we all learn at different paces. Having said that, anyone else, feel free to contribute as I've been mostly speaking through opinions.