In 2015 Dave Thomas, whose name is on the Agile Manifesto, gave a talk named “Agile is dead - long live agile”, addressing the intent behind the manifesto and the Agile Industrial Complex / cult-like movements which spawned from that.
1) Find out where you are 2) Take a small step toward you goal 3) Adjust your understanding based on what you've learned 4) Repeat
I think this is useful as a high-level guide, and it's both easily memorizable and generally memorable. I use a silly mnemonic "FI-TA-AD-RE", and I come back to it whenever I'm working and get to a point where I have to ask myself "What the hell am I doing?"