On cloudy days, go with the original Skyline or a similar camo. That can be very helpful, especially if you think other suggestions would be too noticeable on short notice on this stand. Wait for a cloudy/rainy/snowy day, and wear some whitish/gray camo.
Other ideas: Also, a few days after a big windstorm in the summer, I often go through our woods and there will be these big branches from cottonwoods that will have fallen and the leaves die but stay attached. I literally drag some of these up into the tree and place them both around my stand AND above and behind me (from the deer's perspective).
On another stand, I actually took some woven wire and wired a bunch of it out in front of me in the shape of a C (bulge pointing outwards) so it helped form a nest. Originally I was trying to 'train' an already-present wild grape plant into colonizing this wire and making a nice nest for me. The progress was too slow, so I eventually just gave up and put in some of the fake branches others have talked about here and it works VERY good.