It's common to hear the all-purpose methodology nullifier from the client or salesperson, "But this is a small project!" The inside project manager hears this phrase when he tries to convince the project sponsor that a project plan, a materials list, and a written scope are necessary. The external IT service provider hears it from the salesperson when she tells him that the new engagement he's selling should include an additional 15% estimate for project manager duties.
A common concept in fundamental macroeconomics -- the capital projects are still out there. The needs for infrastructure are still there. We're just going to wait until the market shows us that it's a good time to actually move forward with it.
I don't know HOW many times I see otherwise capable leaders trying to make process changes to correct a single person's statistically anomalous behavior problem. Words of absolute wisdom.
Some of the most common management mistakes -
1. Not communicating with the team. - Almost always a problem.
2. Continually focusing on the negative.
3. Changing policy due to one person. - This is a BIGGIE.
4. Not understanding the needs and concerns of your team.
5. Never admitting you're wrong or never taking responsibility.