Running WBS (2)

Earlier this year, I described how I try to pass the time on long treadmill runs, by breaking a long run into shorter segments and running them--especially mentally--one at a time. A kind of Work Breakdown Structure approach. In my current training cycle, preparing for an early October marathon (first try to qualify for Boston!), I'm following an Advanced-Low Mileage plan that has hill repeats every Tuesday: 10 reps, each of length increasing over the weeks to a maximum of 90 seconds, at half marathon pace. For me, the latter pace is about two steps per second. So, for a 90-sec. rep, I'd count to 180. The following is how I break down the 180 count for each of the reps. I do this so I won't miscount within a rep and miscount the number of reps, as well as just for variety.

Here's the WBS:
10 reps --> 5 sets of 2 reps each
Each set of 2 is counted the same way: Set 1: 2 (1 x 1-180); set 2: 2 (2 x 1-90); set 3: 2 (3 x 1-60); set 4: 2 (3 x 1-50 + 30); set 5: 2 (6 x 1-30)
For each set, count the first rep as
1, 2, 3, ..., 10, 11, 12, 13, ..., 20, 21, 22, 23, ...
and second one as
1, 2, 3, ..., 10, 2, 2, 3, ..., 10, 3, 2, 3, ...

So, for example, set 3 would go as follows:
Rep 1: 1, 2, 3, ..., 10, 11, 12, 13, ..., 20, 21, 22, 23, ..., 30, 31, 32, 33, ..., 40, 41, 42, 43, ..., 50, 51, 52, 53, ..., 60, 1, 2, 3, ..., 10, 11, 12, 13, ..., 20, 21, 22, 23, ..., 30, 31, 32, 33, ..., 40, 41, 42, 43, ..., 50, 51, 52, 53, ..., 60, 1, 2, 3, ..., 10, 11, 12, 13, ..., 20, 21, 22, 23, ..., 30, 31, 32, 33, ..., 40, 41, 42, 43, ..., 50, 51, 52, 53, ..., 60
Rep 2: 1, 2, 3, ..., 10, 2, 2, 3, ..., 10, 3, 2, 3, ..., 10, 4, 2, 3, ..., 10, 5, 2, 3, ..., 10, 6, 2, 3, ..., 10, 1, 2, 3, ..., 10, 2, 2, 3, ..., 10, 3, 2, 3, ..., 10, 4, 2, 3, ..., 10, 5, 2, 3, ..., 10, 6, 2, 3, ..., 10, 1, 2, 3, ..., 10, 2, 2, 3, ..., 10, 3, 2, 3, ..., 10, 4, 2, 3, ..., 10, 5, 2, 3, ..., 10, 6, 2, 3, ..., 10

I do these Tuesday hill repeats within my neighborhood, which conveniently has two hills each of about 90 seconds in length. For each set, I alternate between these two hills for the two reps, again, just for variety.

Perhaps more importantly, this WBS approach helps keep my mind busy, so I won't hear the legs complaining that they want to stop (!).