Plans are important IF you want to get something done.
Right now I am planning to use an old analog multi-track studio recorder to record a bunch of songs I wrote long ago. I loaned the unit to my younger brother and when he returned it to me he forgot to give me the power supply, a microphone and cable, and a brick of tapes that I will need to do my project. My brother never used the equipment, by the way.
See, I plan, but, my brother pretty much lives in the moment. That's why he still has all of the other stuff and I have the recording unit itself. Sigh...
Most people are like my brother. They live in the moment. They don't plan and they don't think very far ahead-- if at all.
When I sit down to record a song I have everything I need at my fingertips. I even have a cup of hot tea or coffee to sooth my throat when I start to record vocal tracks. If you walked into the studio space in my home you would see an acoustic guitar, a bass, a keyboard, drums, and a few other instruments lying around. I am ready to use each one in its part in the creation of the song. It all takes planning.
Life is like recording a song. You either plan your path and travel from where you are at the start to your destination or you simply meander along without any definite plans and just react to whatever events unfold. I prefer the former, not the latter.
A song needs a foundation. The drums and bass guitar (or string bass) tie everything together. The rest of the composition is built on that platform.
The rhythm guitar sets the melody. Lead guitar licks are just window dressing-- they add flash, but, they are not really necessary if the rest of the song is compelling. The vocals tell a story and help make the song dynamic. Harmonies help build drama and excitement. They are icing on the cake.
Your life is a song. All of the elements are there. With proper planning and execution, you'll have a hit. But, fail to plan and you plan to fail.