Use whatever image hosting service you like and post the link to /r/woodworking. The key here is it needs to be apparent that you've built the entry, and you follow the photo requirements listed in the contest rules. Submissions of finished photos only will not be accepted for entry. <-- I can't emphasize this enough, you absolutely need more than 2-3 photos for a valid submission. I will no longer accept entries that have albums that go from rough stock to 90% complete in one jump.
Build your own platform bed frame at your home by following the source linked tutorial given above. The source link also includes more pictures that can help you to build a better bed frame. You can see a step by step set of instructions and guidelines to follow with real life pictures, as well as you can download a PDF file detailing the list of materials and tools you’ll need, know about the length of every board, and most importantly color-coded illustrations of the building process.
Sanding small items is tricky, as they’re hard to clamp in a vise to work on them. So instead of bringing the sandpaper to the workpiece, I bring the workpiece to the sandpaper. I glue sheets of sandpaper to a piece of plywood; 60 and 100-grit on one side and 150 and 220-grit on the other. Spray adhesive works well for this. Since there’s sandpaper on both sides, my sanding board doesn’t slide around on the bench. Check out these small projects!