I also find that the speed to setting your TODOs matters a lot, and nothing is faster than a TXT file, especially if you travel a lot and internet can be spotty.

As a mental trick, it also seems to help that the first thing I do is look at my TODO since it's the fastest and untethered from my web browser. Once I open my web browser, I need to check e-mail and other things and it's quick and easy to get distracted before you're focused on your short term goals for your working session.

But of course, if Trello works for you, but all means.

I have tried Trello in the past over an extended period, but it didn't motivate me to keep using it.

Elsewhere, I have talked about solving disorganization by knowing the quirks of one's own mind.

One of my quirks was internet distractions, and at one point, it got so bad that I'd simply keep my router switched off and use an inconvenient mobile for any research. No easy internet=less distractions, but also no trello.

Another quirk is that I like to write down my planning analyses and thoughts, sometimes in multiple paras. They help me to plan and correct plans. Trello or mind mapping interfaces are not convenient to satisfy that kind of quirk. TXT is ideal for it.