There are many tricks to making rollers bearable.
You need music for a start.
But you must learn to use the repetition and endless sitting in one position to your advantage. This is why I think rollers are better than a turbo.
You learn to toughen up rapidly on rollers. People that say to me they have the turbo set up with the TV and a fan and one of those sweat catchers on your top tube just makes me smile.
I much prefer the shed with the same wooden blank wall and a bit of wind blowing through the door with my I phone music.
When your going through a bad patch in a fell race or on the bike just think well im not sat rollering and it helps you push on through.
As for sessions.
Ride to the turn which is half my session. So 30 mins 85,90 cadence
Get there and set my stopwatch then try and do 20 - 25mins on hard
14 x 1 min on and off
2 mins on and 2 mins off
10 mins on / 10off then another 10mins
4 mins on then off
you get the ideaaaaaaaaa Hann
The shorter the ON the faster you go.
It helps having the I phone stopwatch. If you just ride at the same pace start to finish you will quickly become so bored you will dread going on them. Its helpfull if you can learn no hands as during the off you can have a little stretch.
Throwing structure into roller sessions is completley different to just riding on them.
I wouldnt try doing an hour first off though.