I like to practice for an hour each day. I am going through the Blues course here and take my time with each lesson before moving on. Then I try to learn a song no matter how long it takes in between my blues course lessons. I have already completed fundamentals 1 and 2 as well.
I am not in a band and I practice for the love of me playing the guitar, no other reason. So however long it takes, it takes. Enjoy the ride.