I have a few "tricks" for you guys that work for me.
1. All mirrors are not created equal. The mirror in my bathroom makes me look like shit and the one in my living room makes me look jacked. Lighting also plays a role. I only look at 4 mirrors for reference on how I am doing, the one in my living room, 2 at my gym, and 1 at my University gym. Avoid all mirrrors in clothing stores, they make you look tiny. I look at myself in these mirrors at the same distance.
2. Clothing makes a huge difference. Choose cuts that make you look big. Stick to light colored shirts, white is best.
I can't think of any other ones right now, but this has really helped me.