One question i wanted to ask you, this morning as i was driving to work, i was in 5th, car slows down in front of me, and i dont have enough time to rev match on down shifts, so i press the clutch go from 5th to 4th to 3rd slowly release the clutch and accelerating in 3rd. This was very smooth transition in 3rd however i am not sure if i should have blip the gas pedal a little bit while i was holding the clutch in 4th and then put the car in 3rd. The down shift for me was very smooth without rev matching.
Don't overestimate the need
to downshift in such a situation. What I mean by that is that you can probably don't have to downshift right away in such a situation. In fact, you might not need to downshift at all unless the car slowing down in front of you ends up slowing down a lot.
For example, if you're in traffic in 5th gear at, say, 45 mph and the car in front of you slows down to 30 mph, you can just brake and stay in 5th gear without having to downshift into a lower gear. You can just use the brakes to slow down and then make the decision whether or not to shift into a different gear.
Also, it is possible to downshift smoothly without blipping the throttle when you're in a situation where your speed is decreasing and it happens to be perfect for the next lower gear.
But either way, don't get too hung up on downshifting because it's really something that we do for fun rather than being absolutely necessary in most circumstances. I know drivers who downshift all the time while coasting to stop at a red light, for example. I'll do that on occasion, but definitely not all the time. Most of the time I'll just coast in whatever gear I happen to be in that the time and just pop the trans into neutral when the rpm is too low to continue moving in that gear. Even if I'm in 6th gear, I still don't have to put it into neutral until I'm under 30 MPH.