Here are my tips to make the turbo more bearable.
1. If you know you will be using the turbo if poss get it ready the day before so you can just climb on it.
2. Have a plan before you get on, don't just get on and think what shall i do now! Some tips I've given before Blog
3. Have a good warm up, here is my Warm Up Blog
4. Use a fan
5. Good music or DVD
6. Towel and drink
7. Turn into a climbing session by putting something extra under front wheel apart from your riser block, if you add an extra 8-10cm this will recreate the gradients of the Marmotte or the Etape and use your muscles in a similar way to climbing seated, plus if you lower your cadence to 60-80rpm this will be as close as most of us will get to climbing for any length of time.
8. Create a rolling road by changing cadence every 3-5min but stay at the same intensity say from 80-90rpm to 100-110rpm, this will be like riding outside over a rolling route and staying in the same gear, cadence comes down as you climb and goes up over the top.
9. As above, but if doing 10min blocks of something specific change cadence ever 1min.
10. Here is a previous blog about bad weather (snow) long turbo sessions BLOG