Here's the thing about creative: most people make it way more complicated than it needs to be. You don't need a fancy app or an elaborate system. You just need a solid idea log template and 10 minutes a day.
What makes a great idea log? From my experience testing dozens of formats, three things matter: clarity (can you fill it out in under 5 minutes?), structure (does it guide you without feeling restrictive?), and flexibility (can you adapt it as your needs change?). The printable collection at 147.zone nails all three.
Some popular options in this category: D&D Character Sheet — Premium ($4), Poetry Forms Practice ($4 - $3 - $4 for the whole set). Browse the full collection here.
The templates are instant download — no account, no subscription, no nonsense. Print as many copies as you need. If it doesn't work for you, it's free.