Hi Helkel,
It is difficult to give general advice or "tips" in these sorts of situations. You really will need to speak to a family lawyer who will review your situation properly and ask all the right questions.
To give you the heads up on the sorts of questions they might ask, this will include:
1. What assets are in his name, your name, joint names?
2. What debts are in his name, your name, joint names?
3. Plot out your and his average wages brought into the relationship over the course of the relationship - so who was the bigger bread earner
4. How long have you been married?
5. If shorter marriage, say <7 years, initial contributions of assets into the relationship is relevant.
6. Who did what in maintaining the assets, looking after children, taking care of day-to-day living activities.
7. What are the future earning capacities for each of you. For example, if your husband cannot work again, there will be an adjustment in his favour.
There are a couple of things you can do to ensure you protect yourself somewhat prior to separation:
1. If there is any equity in your mortgage or any funds in joint accounts, tell your bank that your separating and require two signatories to withdraw funds.
2. Stop your income going into the joint account and set up a sole bank account (this will still need to be disclosed in property settlement).
3. Download copies of bank transaction histories for last 12 months. Highlight any of his wastage of money - e.g. pot. Estimate the level of contribution to mortgage and outgoings of each of you.
4. The main assets for division in typical situations are property (home) and super. If you leave the home, it will be much more difficult for you if he doesn't want to leave. He will drag out the legal process longer to wear you out. If the house is in his name, he will have full control over whether he sells and the onus will be on you to take the matter to court and obtain orders to sell the property, and prevent him from further encumbering the property. Ergo, your legal costs will run higher at the beginning.
5. You can lodge a caveat on the property if you do leave to protect your interest, but only if you have contributed to the property in a manner that creates an equitable interest (see a lawyer before you do this because there can be consequences in the form of damages)
6. As you probably wont need parenting orders, you are in a position where you don't need to wait too long after separation to let the dust settle. Start by telling him what you think is a fair division. If he wants to stay in the house, then put a figure to him to buy you out. if he doesn't agree, commence court proceedings (with lawyer's advice).
All the best.