My view is that if you get bored on a turbo trainer then you aren't trying hard enough! True, it would get boring if you tried to do 5 or 6 hours on one but you should be able to cope with 30-75 minutes.
I can't read or watch TV when I'm using my gym bike because I'm too focussed on what I'm doing. I listen to loud, fast music on headphones (so I don't disturb the neighbours) and concentrate on trying to pedal smoothly. I set the friction to low for warm-ups, recovery between efforts, and warm-downs. I use a moderate friction level when just I want to spin away at a constant level of effort. If I am going to make a harder effort, I'll choose a friction setting that I can only just pedal against at my chosen cadence (90-100 rpm) for 15-60 seconds, whatever I've decided on.
I have a computer on the bike but I only use it for the elapsed time readout. It can also display speed, and calories burned but those numbers are completely useless since the device is not calibrated - it has no way of measuring how much braking friction I apply to the flywheel!