Every week, I post a weekly photo. This can be a recent photo, or one I took earlier.
In addition, I also started to regularly re-post selected photos based on constructive feedback I received on the weekly photos. These re-posts also include a short discussion of the feedback, suggested changes, and the changes I finally made.
I also post my weekly photos on 500px.com, which quite often leads to constructive feedback on these photos, which sometimes triggers me to experiment with changes in the post-processing (light, colours, crop, etc, etc) of these photos.