Before coding, first get all of your ducks in a row. So, for example, if there is specialized hardware that the program will be connecting to, then write a class or test program that shows how to utilize that hardware. If someone else has already done this, then try running that code in debug mode to see how it works.
If there is some sort of programming that looks difficult, complex, or tricky, then solve that problem before tackling the rest of the code.
Solve the hard, tricky parts first before doing anything else.
After all the hard and tricky parts have been solved, then it should be relatively easy to put it all together.