Shift peeking monsters

is it ok to peek while holding shift(walk)? or better without shift?(but i afraid it will make sound).. or peek while crabwalking is better?

I always hold either Shift+W+A or Shift+W+D when I walk and peek corners but is this not the proper way to peek? I get that you would need to press the opposite direction keys to completely stop, so if Im peeking pressing W+A i'd need to press S+D then shoot to get the best accuracy but can i just stop by letting go of the keys and shoot and have the same effect as pressing the opposite direction keys since im already at a walking speed? or should i get into the habbit or peeking with just Shift+A and SHift+D to get the best accuracy since ill be pressing only 1 key instead of 2 to stop?