I get naked, have a nice bath or just look at myself in the mirror a while and get friendly with it. When I'm focusing on only one aspect, here or there, and getting mean with myself then seeing my 'whole self' in the mirror helps me realise that I am a person and not a machine/object. It kind of puts me face to face with what I'm doing and also helps me realise that just because my body is mine doesn't mean I also have a right to 'push it around'. Seeing myself this way reminds me that my body is doing so much more than what I'm concerned about - keeping me alive, digesting food, protecting me, fighting, pumping, etc.
When recognising all those things, my previous worries then seem a little bit unfair. Even if I am standing there extremely bloated (which is also a feeling I really dislike), I just sort of laugh a bit and realise I am expecting too much of myself - and if anyone couldn't handle a bit of bloating, they are not the person for me anyway (friend, partner or otherwise). I then tend to 'curl up in a ball' at the end and try to hug myself, and then seeing everything all folded up and scrunched up together kind of just looks funny and removes all the seriousness of it. In the end of the day, we're just a bunch of blobs! It's amazing that we are out here and alive!
Dancing also works and sometimes follows all this. It keeps things fun