Yes, things I need to achieve. Could be delegated. The little things get thrown out if the big thing takes longer.
People write to-do lists but leave them unstructured. Then they go do the small easy things first and leave the bigger harder tasks to later when they’re already tired.
Speed work (running) when heel up to it. Less mileage more quality
strength and conditioning
Probably won’t do either 
SLEEP.
Swim, bike, run.
Spot on
It is still a to do list. I sort of do the same thing. I either order by priority or time needed. I can usually do a couple of the quick things on my list early in the day regadless of rpiority before stand-ups, etc. As @joex mentions above, if something requires a lot of concentration and time I don’t start them if I know I will be interrupted by a series of short meetings. Once they’re done I can get on with the more meaty tasks. I don’t have a massive list of everything I need to do, just what I want to get done. I like to do at the end of the working day as that way I find I don’t have an evening where I keep recalling things I need to do the following day.