Landscape or square shape not portrait - as that makes the most of the space
Focus - learn how to get your camera to focus on the most important thing whether a face, the foreground or whatever.
Composition - as well as the subject of your photo, fill the frame with interesting foreground and background. Make the most of every pixel.
Rule of thirds - divide the frame into a grid of thirds. Use the lines to compose the shot. Put the horizon on one of the horizontal lines. Or position your subject in one of the ‘hot spots’ where the horizontal and vertical lines meet.
On bright days, have the sun behind you and on your subject. Morning or evening light is kindest. If indoors, light from the side makes an interesting photo.
A bad photo can ruin a good scene - take the best possible photo you can of a person, place, object or process. If it is not a great shot then think twice before sharing.
Sequences of photos can tell a story really well. Even without audio or accompanying text, a succession of good photos can illustrate research or farming really clearly and powerfully.
Brand promotion - your photos can include logos as a way of illustrating the involvement of companies or organisations. Tag them in the photos when sharing on social media. This may increase the likelihood of them sharing your social media post.
Credit where due - if someone else took and owns the photo you are sharing on social media then make sure you have permission to use it and credit them.