When i have a heal itself in inventory, i always try to get rid of it quickly. because when i go attack with c4 - i put the 4C4 and i can press accidentally healself. and since I'm at this point is vulnerable (can not shoot back and all can see me if i stealth class).
Do not know how the others, but I often find ourselves on this, particular in critical situations.

I used to have a bind that shits out all C4s at once, doesn't touch anything else. I'll go find it later.

ye, i bind 4c4 to, but anyway it not total close problem

You know, you can just count how many times you press the invuse key...

Also, self-heal can be canceled with altfire

Ye, I know about bind invuse key and about alternative fire. but anyway, in critical situations you lose 1-2 second for altfire, and for stealth its critical fail if you play vs pro players. maybe do faster change weapon for selfheal? for if you accidentally and selfheal not need.