Starting road training

I actually quite like turbo sessions, I do find tho that it's good to have a structure to them which helps you avoid the tedium - todays was a focused strength session, 1 minute at 360 watts, recover at 220 watts and repeat - you end up concentrating on each specific interval and I was so cross-eyed at the end of it that boredom was the last thing on my mind!

What do you use to measure your power?

edit - That sounds like I'm asking what is available. I should have said. What do you, personally, use to measure your power?