Excess Choices

increased number of choices may cause more strain in choosing.

Regret vs Failure

The feeling of regret is more destructive and prolonging than the feeling of failure. Better try and fail than to regret not trying.

Assumptions

Cease making assumptions about the knowledge and experience of others.

Advice

Even presidents have advisers. There is no need to hesitate to hear advice from various sources.

Convenience vs Effectiveness

There may be a tradeoff between convenience and effectiveness. At some time one may try to reduce burden for another by presenting a more convenient approach, however this so-called "convenience" may work to be less effective and in fact more inconvenient as a result.

Window of Opportunity

If you fail to act within the window of opportunity for a particular opportunity, look for a new one.