Start by acknowledging discomfort

Start your day with a small misery that won't kill you to be aware of the discomfort you will face in the day. It's why people have cold showers (I assume). I first heard this on The Blindboy Podcast.

It's a reminder that life is suffering.

Similiar to the stoic philosophy best expressed by Marcus Aurelius:

Begin each day by telling yourself: Today I shall be meeting with interference, ingratitude, insolence, disloyalty, ill-will, and selfishness – all of them due to the offenders’ ignorance of what is good or evil.