Unlike every solution given in this thread that are basically well-known solutions there are still better things to do to increase your volume of work done and shorten the amount of time spent on doing same amount of work.
I will create a small Problem - Solution scheme so you can understand fast what I am saying.
Your problem looks like: A lot of work, not enough time.
Solutions:
1. Do the work faster.
2. Increase your time.
Now let's figure out how can you get the results you want.
1. Do the work faster.
For increasing your speed in solving the homework you have you can do a lot of tricks as well other things to do your homework faster.
Trick no. 1: Take a psychological test and determine what is your kind of intelligence from the types of intelligences. After you have done that adjust your learning to your type of intelligence. For example if your intelligence is visual learn through making diagrams, if it's musical register yourself reading a lesson and after that read and listen to the lesson at the same time. You can find a lot of tests on the internet.
Trick no. 2: Eat sweets - glucose is one of the most powerful energy booster when you are learning. Eat different kind of sweets when learning you will feel way more active than before.
Trick no. 3 (Coffee Trick): If you have no problem in drinking coffee or black tea do the following. Buy lecithin pills and take a lecithin pill and after that drink fast a cup of coffee or black tea. This trick is very useful because lecithin improves your memory and coffee/black tea increases your energy. The combination gives you a very good result and you can increase your speed in doing homework for like 25-30%. I tested this and works perfectly.
Trick no. 4: Binaural brainwaves, you can increase your attention and speed in doing brain tasks by doing 2 things that I know and tested and work perfectly:
1. Listen to this or similar music while doing homework:
http://www.youtube.com/watch?v=nNC6nZa8VRs
2. Overclock your brain! - Search for I-Doser over the internet get the Brain+ QH dose (10 mins length). Lay in bed cover your eyes with something to be completely in the dark listen to the dose and concentrate on the sound. After that you will work a lot better and you will feel like your brain is able to learn faster
I tested Brain+ QH as well and to my results I did an IQ test w/o listening to it and one after listening to it. I got like 6 points increase after I listened to Brain+.
So first part done.
2. Increase your time
Trick no. 1: Time management. Create a schedule that you will follow strictly and find what can you do to improve your working time to do the homework.
Trick no. 2: Insert small breaks. When learning/doing homework work like this. Study for 25 mins and take 5 mins break than 25 again and 5 break. Doing this it will help your brain taking breaths here and there so you can work longer.
Trick no. 3: Polyphasic sleep. First do a search on the internet to know what it is then you can choose to follow my schedule and you will gain like 2-3 hrs bonus from each day.
Day length: 24 hrs.
Normal people:
- sleep a big chunk for 8 hrs, if they sleep less they will sleep more in the weekend so time remains almost the same
- are awake for 16 hrs
Polyphasic sleeping people:
- sleep in small chunks gain more hrs and can mantain the same sleep during the weekend easily.
- are awake 18 hrs at least
My schedule:
16:00 - 16:20 (Take a nap)
19:00 - 19:20 (Take a nap)
23:00 - 23:20 (Take a nap)
Nap time: 1 hr asleep
Sleep: 03:00 - 07:30 - 4.5 hrs
Total Asleep: 5.5hrs of sleep
Total Awake: 18.5 hrs
I'm doing this for like 5 months now and I don't feel exhaustion or something like that at all even though I stay awake for more than 18 hrs. And I'm doing it each day including weekends.
Trick no. 4: Sleep in cycles. During sleep brain still works but in cycles of 90 minutes than it calms and takes another round and so on. If you manage to sleep in 90 minutes cycles you will feel way better when you wake up than rather waking up in the middle of a cycle.
For example: I sleep for 4.5 hrs at night = 270 minutes = 3 full cycles and I'm waking up right after last one. I always feel like after a baby sleep.
To adjust your sleep for cycles determine how many cycles you want to sleep and then multiply number with 90 and the result will be the number of minutes and you can calculate your waking up moment easily. There are also a lot of apps on the internet and phone to calculate that.
ex: No Of Cycles x 90 = Amount Of Sleep Time
***NOTE: I tested all of this and I'm regularly using all the techniques written here with amazing results rather than other people and friends that are sometime way behind me.