What putting drill has given you the best results

I am interested to know what putting drills you use and what gives you the best results when you take it to the course.

I practice mostly at home, putting the ball across the floors. The key is to make sure that the ball rolls end over end. Meaning that if you drew a line over the ball, it would not "wobble" as the ball rolls.
On the practice greens, I practice 5ft and 10ft putts. I try to let the ball feed into the hole as opposed to ramming the ball in. I suppose it helps with my distance control.

I find that trusting myself works best... Although not the easiest, surprisingly.

I place the ball in-between two tees position in parallel to in-grain the feel on the squaring of the putter face to the ball at the critical part of the downswing ...  

I have two methods, the 1st is that I put nearly every day at home on an 8ft putting mat. I focus on the key aspects of my putting: stance, ball position and swing. Because I die the ball in to the hole rather than give it a belt rhythm is important to me. My 2nd drill is on the practice green where I do one chip one putt from different locations and lies. I try to go ten out of ten, if I miss I start again.

Bro, where did you get an 8 ft putting matt?

I read this drill online somewhere. Starting from 1 foot (where you just knock the ball in) on a flat surface up to 6 feet. putt 6 in a row and redo. It helped wonders with my confidence.

Another was distance control where I take 10 balls and do 10 long putts and my aim was to get the ball around the magical 3 foot circle where I would be able to comfortably make the putt in two.