A board is considered “quarter-sawn” when the growth rings run, more or less, perpendicular to the face of the board. Quarter-sawn boards generally have straight grain and are less prone to shrinkage, compared to other boards. These factors don’t come into play with the 2x4s you use to frame a closet—but it does with the shelves and cabinetry you put into that closet; you want those boards to remain straight, flat and stable.
Hard to determine which stain you need in that bespattered collection of cans? An easy-to-make “stain index,” courtesy of reader Bob Jacek, solves the problem. Section off boards of your favorite woods into squares with masking tape, and apply the different stains across the width of each wood type (pine, oak, birch, etc.). When the stains are dry, brush on lengthwise your regular ﬁnishes—polyurethane, water-based polyurethane, oil, orange shellac, etc. You’ll be able to tell how each stain looks with each ﬁnish. Label each one. Use both sides of each board, and you’ll have a wooden encyclopedia of stain and ﬁnish combinations. Plus: How to stain wood evenly.
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.