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It might help if you were clearer in your question... is this three separate sayings, or one?

Separately, they mean:

Abandoning the norm: do something different, unexpected, be unique. Everyone else is doing A, B, and C - why don't you try doing H, M and W?

Handling the harvest: Do your job, work hard, do what is expected. You have been given tasks and people expect and depend on you to do what you were told - so do it.

Measuring the worth by the depth of the hardship: Value is based on how hard you worked on the project. If it was easy, it was cheap - if you worked hard for a long time, it is worth much more.

Against contrary wisdom, remember the difficulties you've gone through when you think back to what you've done.