A wonderful little movie entitled "Obvious to you ... amazing to others' is in the back of my head when I write about the things I do at my school.
Every teacher will do something in their day to day practice that another teacher would benefit from hearing about. https://www.youtube.com/watch?v=xcmI5SSQLmE
One of the key things to remember about sharing your professional practice or thoughts is that it is not 'showing off' - it is SHARING which hopefully and I can attest becomes a two way street. Also, there is nothing wrong with receiving affirmation from our peers. We know our students like it. I think as a profession we sometimes forget to value of the work in the rooms next door or in a nearby school.