Maybe keep changing routine to keep things fresh and challenging. Get some really good music to take with you and look forward to going and switching off with some good tunes. If they have TV in there could you go when something you like to watch is on while you exercise eg do 30 mins on the treadmill/stepper while you watch Eastenders.
You could also look into classes. I always found them far better to get into and loved step and dance classes and such. Often they also have group running/rowing etc... sessions. Swimming is also great as a difference to your routine is there is a pool at the gym or locally. There might also be aqua classes.
I found a gym buddy helped. Before my arthritis kicked in so badly a friend and I used to go three times a week on set days at set times, more difficult to pull out if there are two of you and you then have some company and have more of a laugh when you're there.
Why not get some other activities planned which are energetic while being more fun like ice skating or going for a bike ride or long walk at the weekend or set a goal like climbing a hill or mountain or just a walk that challenges you a bit. You can change it all the time.
Maybe set yourself a goal. I have a number of friends who have achieved some brilliant goals just by having something to train for such as the local Great Manchester Run, urbanathlon and long distance charity bikerides. There are loads about, Race for Life, midnight walks, charity cycles. It led to a number of group sessions in parks for extra training and one friend in particular has made some amazing progress with a personal trainer.



