Neck and shoulder discomfort can build quietly while you read, type, craft, or try to hold yourself in one position. Before adding stretches, it may help to notice what the task is asking your body to do.
Reduce the demand first
Bring the work closer, support your forearms, or adjust the screen so you can see without leaning. Let your hands rest for a moment. If your shoulders are working to hold an object or your arms up, changing that support may matter more than repeatedly stretching afterward.
If you have an appropriate movement plan, use the comfortable motions you have been taught. Avoid forceful neck circles, pulling on your head, or pushing through pain to achieve a larger range. Hypermobility, injury, and other conditions may require particular precautions.
Look for a workable rhythm
Alternate tasks where possible and allow pauses that do not involve another screen. A supported position can still become uncomfortable if you stay there too long, but the timing of changes should fit you rather than an arbitrary rule.
New weakness, spreading numbness, severe pain, or symptoms after an injury need medical advice. For recurring discomfort, a physiotherapist or occupational therapist may help assess the activity and your setup. You do not have to keep correcting yourself all day. The environment and workload deserve attention too.