The Sign of the Cross is the most frequently-used Sacramental in the Church.
It is VERY simple to make the Sign according to the tradition of the Roman Rite.
Begin (of course) with your thumb and first two fingers of your right hand joined (as though you were pinching some salt for a recipe).
Touch the fingers to your forehead as you say, "In the Name of the Father...".
Touch your chest BELOW your ribcage (somewhere just above your navel) as you say, "...and of the Son...".
Touch first your LEFT shoulder, then your RIGHT, as you say "...and of the Holy Ghost, Amen".
(This is approximate; there is no need to associate each movement with one word or syllable.)
Now, then: WHAT is so difficult about that? SO many people do the most ridiculous things! I've seen people trace a Cross UPSIDE DOWN, because they start at their forehead and then barely touch their chest below their CHIN, and then move on. Draw it on a piece of paper, and you'll see what I mean. The distance from the shoulders to the point you touch on your chest/abdomen should be LONGER than the distance from your forehead to your shoulders.
I've seen other people just sort of flap their fingers in a general, vague shape, not even bothering to trace a proper Cross.
Is this being overly scrupulous? I think not. I think we need to imbue every action, especially Sacramental ones, with reverence and dignity.
I know it's such a relatively small thing that there will certainly be people who will 'tut-tut' me and tell me I'm being legalistic or too strict. I accept that in advance, but I insist at the same time that we are NOT facing the crisis in the Church because of one or two HUGE things that happened suddenly, but because of hundreds, maybe even thousands, of LITTLE, seemingly insignificant things that happened over years and years.
We simply weren't 'minding the store', as the old saying goes, and now, what seems to be a wholesale rejection of the Faith by so many is really nothing more than what millions have been CONDITIONED to accept, because no one was really paying attention decades ago.
Seriously... I HATE the Novus Ordo religion and all it stands for, but the vast majority of people claiming to be Catholic in the NO today are just blindly following the stupid, shallow habits of their parents and grandparents, many of whom were RIGHT THERE in the pews as these revolutionary, heretical seeds were being sown.
Please, friends... such a small thing, but imbued with graces for us because it brands us with the mark of Our Lord.
Make the holy Sign of the Cross CORRECTLY, with reverence and love for the One Whose Cross it is.
St. Simon of Cyrene, pray for us.
Immaculate Heart of Mary, triumph soon.
Sacred Heart of Jesus, have mercy on us.