Cisse fell out of favour after the arrival of Aleksandar Mitrovic in the summer transfer window and has been linked with a move away from St James' Park in January if his situation does not improve.
The Senegal international conceded it was hard not being involved with the matchday squad, but revealed it has not affected his work ethic.
"If I play, I will get chances to score and win games for Newcastle. I haven't had that chance of late, so I need to keep going.
"When I go into work, I work hard. I know I must keep being busy and working. It feels like you've worked for nothing after a week of training when you don't play. In my head I feel like I've done nothing, but I must keep going," he concluded.