The first commandment:

Thou shalt not fear to get started!

Don't get stuck.

Write down whatever comes to your mind to explain how to solve the problem.

Then read your explanation:

• If if it is wrong, scratch it, erase it, try to do it right.
• If it is right, but imprecise, good! Just add some more explanation.

You may write these explanations as comments

then you insert more comments and code.

Example: Two athletes talking. (pg. 102)