There's this weird thing going on in VCE where students sometimes feel like they have to be super motivated all the time, or do lots of work, or be always 110% prepared for everything.
Yes, it's important and you need to work. But that doesn't mean you have you be pumped to study all the time.
If you're on AN, chances are you already take your studies seriously. If you don't feel like working, then don't. If you don't feel like working but something urgent/important is at hand, then you'll do it anyway because it's
due the next day :O. When you feel like working, sit down, work efficiently and have fun. But if you don't, don't stress about it. Everyone gets lazy and it's better to enjoy the lazy times without stressing and then work efficiently when you actually work.
I found that not stressing over when I was being lazy and then enjoying my subjects when I actually worked made Year 12 a really enjoyable year. Yeah, I actually enjoyed the whole study routine in VCE.
If you're doing subjects you enjoy (and by looking at your sig, it looks like you are) then you should be alright!

That aside, here's a practical list:
1.
Have a to-do list.
It helps you collate everything you need to be doing each week on a single document.
Ticking off completed tasks makes you feel like you've accomplished things. If you must, break big tasks down to little bite-sized pieces and tick lots of them off! (A good way is to separate all your work into chunks that require about 30 minutes each and work in blocks).
If you have a master list or save all your to-do lists, you can look back on what you've done for the year and that will help motivate you even more for the rest of the year!

Useful app: myHomework
2.
Have a routineThis only works for some, but having a set period every week where you sit down and do work can be useful to get regular, productive study done. Last year for example, I stayed back after school in an empty classroom with a friend or two and we would sit silently from 3:30pm to about 5:30pm doing work. We'd take breaks every 30-45minutes to chat, eat, etc and then go back to work. We would do this 2 or 3 times a week, and this was my most productive time. In fact, I barely got any work done at home because I was so used to the routine of working in a classroom after school with friends. You can designate specific free periods for this, or an afternoon on a weekend. It's useful when setting a routine to also establish a certain study area/study buddy to do it with.
3.
ExerciseDoing it gets you pumped up and feeling energetic and by extension productive. Go for run and you'll likely return home ready to get some work done.
4.
Don't be pedantic about thingsIf you fall behind, don't feel the need to try to catch up. This is particularly relevant to high-reading subjects like history, philosophy and politics. Most of the time the set readings are great for extra information and historiography but not crucial to the core content. Skip to what the class is up to and come back if you ever have time. Feeling the need to always catch up will just demotivate you because of how much there is to do.
This can also apply in other things. In English, don't get pedantic about essays. Just write whatever you can, don't worry if you think it sucks, and just get it done. Come back later to edit, or get a trusted buddy to proofread.
In maths, if you're several exercises behind, again, don't feel the need to catch up. Don't be pedantic about finishing all the set questions (if you're a MacRob girl, you'll know what I mean with those tick sheets). Skip to what the class it up to and go back to it.