A Simple Way to
Establish Awareness:

Friends, this highly advantageous
praxis can be undertaken by anyone, at any time, all
day long, in all situations, and at all locations! Therefore
remember it, and repeat it:
When walking, one understands: "This
body is walking.."
When standing, one knows:
"This body is standing.."
If sitting, one notes: "This body
is sitting down now.."
While lying down, one reflects:
"This body is lying down.."
When moving forward or returning, one
clearly comprehends exactly that..
When looking forward or backward, one clearly comprehends exactly that..
When bending or extending a limb, one clearly comprehends exactly that..
When dressing or carrying things, one clearly comprehends exactly that..
When eating, drinking,
or chewing, one clearly comprehends exactly that..
When defecating or urinating, one clearly comprehends exactly that..
When walking, standing,
or sitting, one clearly comprehends exactly that..
When falling asleep or waking up, one clearly comprehends exactly that..
When talking or dwelling in silence, one clearly comprehends exactly that..
Rational and alert attention is thus a cause of
ultra-clear acute comprehension!
When continuous
Awareness is established, it
can prevent all sloppy mistakes,
and their painful after-effects... In this
very way does clear comprehension lead
to
reduced frustration, and gaining a new satisfaction! If correctly cultivated,
and made much of, this praxis will be
for all being's welfare and happiness
for a long, long time... Why so? Clear comprehension purifies the purpose,
the suitability, the domain, and the unconfused
focus of any activity.. Basta!
More on Clear Comprehension
(Sampajañña):
Clear_and_Aware_Comprehension

Source: The Exhaustive Speeches by the
Buddha. Digha Nikāya 22
https://What-Buddha-Said.net/library/ati_website/html/tipitaka/dn/dn.22.0.than.html
http://store.pariyatti.org/Long-Discourses-of-the-Buddha_p_1542.html