I have a four monitor setup, I tried to dedicate one of them to use Asana and tried multiple tracking software to be organized. Didn't stick.

Then I purchased a big vertical whiteboard and bunch of colored markers, writing down my to-dos and to-learns/ideas. Usually I try to do it monthly, but some tasks remain for longer than a month. I make many grids on it, and distribute client requests, my personal stuff, some random notes once in a while.

I tried to use some iOS paid apps but I realized I don't want to look at my phone more than I already do.

In the past I tried to use regular notepads, bought many kinds but I couldn't follow my notes anymore. So far my whiteboard was my best friend because it is huge, whenever I turn my head I see it. But for time tracking, I have no clue. Get a whiteboard, no matter what you do, you will use it.

If you don't need minute-by-minute accounting, you might like TagTime [1]. It will pop up a window at random times and ask what you're doing. Over the course of several weeks it can build a good picture of where your time is going in aggregate without the hassle of having to manually punch in and out of a timesheet or the potential privacy problems associated with completely automatic tracking.

[1]: http://tagti.me/

I use an automatic time tracker for all my side projects:

https://wakatime.com

I use timing.

https://timingapp.com/