I'm fairly capricious in planning my workouts. I typically have some overall goals for the week like Long Ride on Saturday, Long Run on Sunday, Swim Twice, at least one Brick. During the week I just see how I feel. Like today I'm thinking, maybe I'll go for a swim around lunch time and run in the late afternoon.
One thing that keeps me "honest" is a point system that I read about on Slowtwitch. You get one point for every 100 meters of swimming & every mile of cycling and four points for every mile of running. Then you can get a fair idea of what percentages you are doing across all sports. To date I'm at about 5% swim, 46% cycling, and 49% running. That's about what I wanted to do...though I know swimming has been a bit light, I feel confident I can get through the 2.4 mi swim relatively well. I really needed to focus on my running for this event.
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Fredo, you're my older brother and I love you...but don't ever take sides, with anyone, against the family again...ever.