I just started studying this month for the LSAT and I also work full-time. What I do is study on my hour lunch break Monday-Friday then when I get off I study for at LEAST 2 hours. Although I know I could potentially squeeze in 4 hours after work MAX. My weekends are free pretty much starting with Friday night. So I try to wake up early on the weekends instead of sleeping in to get a morning session of studying in. For Saturday and Sunday I dont put an actual number on the hours I study, I just make sure I remember to take breaks as needed.