Just thought I'll add my two cents worth...
1. Don't fall behind
By this I mean, make sure you're understanding the content that you're learning each day. If you're not sure about something, ASK! Because there's a lot of content, it's really easy to fall behind and that's the main reason why grades/motivation start dropping. Because the SACs are spread out throughout the year, maintaining consistency is paramount for success (ie: you can't just cram before exam time... unfortunately
![Tongue :P](https://www.atarnotes.com/forum/Smileys/default/tongue.gif)
).
2. Plan ahead for SACs
If your SAC is based on a practical for example, think of all the questions that could possibly appear and write down full and precise responses to them. Think of the variables in your experiment and things that could have caused errors. If you have to hand in graphs or tables, be meticulous. Make sure you include simple things such as headings and units (these are easy marks).
3. Aim high
It's amazing what wonders this little thing can do. As long as you have the desire to perform well, I can assure you that you will surprise yourself when you get your results after SACs and at the end of year. If a SAC doesn't go so well, just aim for redemption in the next one. If you're giving it your best, the marks tend to come automatically.