Mind being mindful

 

Mindfulness is focusing our thoughts on what we are doing. Being mindful is a state of bliss and the easiest one that everyone can do. It is as simple as, when we sweep the floor, we only mind that and if we diverge on other thoughts, just put it back whenever it is realized.

Sikshavalli (Taittiriya Upanisat)

स्वाध्यायान्मा प्रमदः

Don't be heedless on recitation of sacred texts

 सत्यान्न प्रमदितव्यम् धर्मान्न प्रमदितव्यम् 

कुशलान्न प्रमदितव्यम् भूत्यै न प्रमदितव्यम् 

देवपितृकार्याभ्यां न प्रमदितव्यम् 

Don't fail to pay attention to truth and one's duties

Don't be inattentive to propriety and well-being

Don't be unmindful of what is offered to God and ancestors 

श्रद्धया देयम् । अश्रद्धयाऽदेयम्

Gift should be offered with attention and willingly and not the other way

Example from Srimad Ramayana
When king Dasaratha broke his wish of installing Sri Ram as the prince regent, family priest Vasistha asked Sri Ram to observe fasting  to Lord Sri Ranganatha (family deity of Ikshvaku) the night before the big day

गते पुरोहिते रामः स्नातो नियतमानसः।
सह पत्न्या विशालाक्ष्या नारायणमुपागमत्।।2.6.1

Having bathed himself, Sri Rama along with his wife, who had large eyes worshipped Lord Narayana with concentrated mind

वाग्यत स्सह वैदेह्या भूत्वा नियतमानसः।
श्रीमत्यायतने विष्णो श्शिश्ये नरवरात्मजः।।2.6.4

Having taken the part of havis (oblations to be poured in sacred fire), Sri Ram along with his wife Vaidehi slept on the bed of Kusa grass with concentrated mind on the glorious temple