Add more- do better?

I find it ironic that the more activity added to your plate at a time, the more things get done in a day. Yes, that is logical, but in terms of homework. I always feel the more I'm involved in, the more I have to plan to get things done, and thus, things get done. It's magical.
When there is less going on, and more free time, a person can become too comfortable in their situation, and find all of their work getting put off.

However, on the contrary, when there is TOO much to the point where there is no time to do anything, that's when there's trouble. There needs to be enough time where you can plan to actually do things, but not too little time you cannot accomplish anything.

Like swimming. which is too intense. I enjoy it, but six days a week for 4 hours is not the kind of time I have with IB and everything else needing to get done. It just doesn't happen: it's impossible unless I drop EVERYTHING else. Maybe not, but I'm not willing to risk that. I learned my lesson Junior year.

But now:

IB, Working 20 hours a week, Play, NHS, Show Choir, Applying to College, Extended Essay, plus life, plus chores.
And I still manage to reasonably get it all done.
Some how.

I'm satisfied.