Avoid tensing your body to a rigid posture or a rigid man like style. Such tension makes your body less lively and breaks your experiences to nasty and even slightly painful feeling in your being even when you otherwise with a lively relaxed body would feel happy and satisfied with life. Such tension also destroys your social eye and your quick-wittedness. LIVELY RELAXATION that is versatile and natural, reactive in many ways, brings you happiness together with a better understanding and skill.
Your idea of each situation, your feelings and state of mind are all reflected in your body's posture and gesture langauge. If you keep your body fixed and unreactive, your state of mind gets fixed too and so it isn't the best possible for each situation but a kind of kkrrrrhhhhhh non-working, agitating, non-comfortable which makes things in life feel like a burden and which makes your feelings largely negative.
Instead let your body find it's own comfortable yet lively position each moment. Follow your feelings, be social in natural instinctive ways, enjoy the practical sensed side of life: of feelings and sensations.
In social life being relaxed and lively makes you copy from others and makes you so understand their perspectives better. And it makes your cooperation much better. Similarly with all views and all things that you come across in your life, you can choose a perspective that is suited for just those things - but you can do so only if you are bodily relaxed and lively. So you can meet the things in life in wisest possible ways and so you are continually happier.
Keep your body all the time nicely pleasantly like in a sofa, so you feel much better all teh time.