rdevorse
Well I've adjusted my schedule today. I'm going to try and remedy this with:
1. Shifting my sleep schedule to 1:30a-9:00 instead of 11:45p - 8:45a.
Have been coming straight out of the gym and trying to get into bed in 30 minutes.
2. Change the ratio of cardio to lifting, slightly. Could use more of the "runner's high" to help relieve stress.
3. Take melatonin.
4. Moving quicker through the text and strategy guides, taking only really important notes, and revisiting only the challenging items. This should help focus me on where I really need to improve. Spending too much time on things I know, could be using that valuable time to learn concepts that are not comfortable.
5. Making plans on the weekends and forcing myself to get out of my apartment here. I've been reading off my kindle and hanven't had any real down time with my friends. My closest friends just recently returned back to the states themselves.. Need to get out into the city and get some 'fresh' air.
6. Post more here with GMAT Club on topics I'm not comfortable with. Do need to be able to wrap my mind around concepts, which inslucdes discussing them and explaining to others.
Just been trying to jam this studying into a 3 month window before a travel vacation, and then before the return home and the GMAT format changes with IR. Going to balance life out better. Appreciate the responses
1. Sleep is the most important thing. In my opinion, it’s more important than working out.
2. I think you can balance your lifting and studying. I was lifting 6-7 weeks but no running. I recently started back running and I run a lot as well (2 to 4 miles 4-5 times a week-former athlete). I alternate my lifting to upper one day and lower the next to let the muscles recover. Also, working out is a stress reliever for me. When I first started studying I didn’t work out for a week (I was also sick) but I felt stressed out and tense. Now I make sure I work out because I worked out before I was studying. And it is one of my goals to continue doing it.
3. My doctor told me that melatonin doesn’t work but I didn’t listen to him. He was right though.

I used to have very bad sleeping problems and you DO NOT want to take anything to disturb your sleep. I have a system to eliminate certain topics in bed:
no thoughts about work and no calculating any GMAT math problems 
As soon as I start thinking about them I just say, “work” or “GMAT” to remind myself to stop thinking about it. Also, you can try to imagine yourself in a relaxing setting such as the beach or running. It’s a good way to focus on positive and relaxing thoughts.
4. I can relate to the Number Properties. It took me almost two weeks! I think I was taking too many unnecessary notes (it has been added to my goals to work more efficiently while studying). I still had to buy the Foundations of GMAT math. It does seem like they could explain the material without so many details. It’s still a good book.
5. I study at the library on the weekends and it helps me to stay focus.
6. I have to agree with this statement. You can find a lot of useful information on this site and Beat the GMAT. I also plan to purchase the GMAT tests because a lot of people say they have helped. And I need the extra practice.
Good luck! I hope this helps. The Giants also won so I am happy.

Haha Giants beat my team (Green Bay) so the way I see it, they deserve to go all the way.
Adjusting my sleeping schedule has helped. In case anyone is interested, sleepyti.me is a great little internet timer that helps you determine what times you should be going to bed and waking up to feel the most rested, based on sleep cycles.
I've been adjusting my meal frequency so now when I am at work, I ear right before I leave to commute home. It's helping save an hour of waiting at home.
They just built a new Starbucks directly across from my Apartment tower, so I am there on Saturdays and Sundays with a foreign friend studying. I take my headphones and she understands that I tune out conversations and actually do work. It helps to have support. Don't do it alone if you don't have to.
I haven't been taking Melatonin, because no one I can speak to knows where to get it in this country. Skipping it over is not cheap. So I'm taking a substitute. More importantly, as you mentioned, I tell myself not to think about GMAT/problems/work while lying in bed trying to fall asleep. I find this helps a lot. I will try the visualizations.
More importantly, I have made myself do all my studying for GMAT during the week in the first two hours after I wake up. It helps to get me to work hard and then quit it for the day. I come back the next day feeling refreshed and less stressed, than if I take my workbooks to work and squeeze in extra studying, when I should be focusing on work.
next month. Tomorrow/Wed I should be finishing up Number Properties, with my 'black list' of difficult questions/concepts I struggle with.