Make yourself an honest man, and then you may be sure that there is one rascal less in the world.

There is exactly one person whose honesty you can guarantee. Everyone else can be argued with, complained about and hoped over, and no amount of that changes anyone, while the single unit you have full authority over can actually be fixed. Sorting that one out is a real reduction in the total, small but certain.

So pick the specific thing rather than resolving to be better generally. The expenses you round up, the deadline you knew you would miss when you agreed to it, the answer you give that is technically true. Choose one and stop this week, and let the improvement of everyone else wait its turn.