Doing daily or complex activities without attachment
In Buddhism things are slightly different. Being aware and mindful of what you do (as you say) is more of a hindu concept if it is from the Bhagavad Gita.

This itself is good. A surgeon, ballerina, acrobat, etc. will need to be mindful and aware. If they do not then they cannot do their job. This will make you do a good job in whatever you do.

In Buddhism what need to be done is you should be aware of the arising and passing away of sensation you experience with equanimity. (Pahāna Sutta, Avijja Pahana Sutta 2) This is what will eradicate the 3 evil roots which in turn helps you realise nirvana.