Without doubt, following Matt's advise will get you more fish.
The thing is, it comes down to how badly you actually want to improve your results as to whether you follow this or any other advise for that matter.
It always amazes me when I see people making simple mistakes such as not plumbing up properly, mixing groundbait like lumpy porridge or shotting floats incorrectly.
With all the info available today there is no excuse?, except maybe, that these people are quite happy with the way they do things and do not feel the need to seek advise in order to improve.
As for myself, well, the attention I pay to detail can often depend on the mood I am in, some days I will re-tie knots that are not perfect, and I will spend time getting my groundbait perfect?. Other days I will adopt the ?sod it, It?ll do? approach. Im sure we all do this, we know that something is not quite right, maybe hook length kinked or hook slightly blunt, or we need a slightly bigger float when the wind gets up, but we just can?t be arsed to change it and carry on and hope for the best !