Newguest One thing I used to do is focusing on the feeling of different parts of my body. I'd work on one part of the body after another, then I'd do ..........
I know that it's a very short example, but I would write: I worked on one part..
In your example,
would has nothing to do with condition, but it indicates repeated actions or typical behaviour in the past; in other words, it's similar to "I used to".
If you changed that "
would work" into "
worked", you would refer to only one particular circumstance in which you worked on one part of the body after another. Moreover, it would look odd (to me) because a singular episode would contrast with a past habit, clearly introduced by "
One thing I used to do is..." in the previous sentence.
Just my opinion.