1. understand the divorce process 2. child maintenance (set amount for keeping roof over the childrens heads and food in their belly). If 50/50 split on custody then neither of you get maintenance (which is fair). how do u want custody split? what is reasonable? what is in best interest of your children 3. children related costs - school fees, clothes, unexpected costs, health insurance, future costs (university fees etc) 4. spousal maintenance (are u entitled - normally income based, current and future) 5. division of assets (home, cars, pensions etc plus debts)
other thinga if u have pets then pet insurance, upkeep and vets bills. do you want a say in who babysits/watches your children what about future partners (when can they meet the children) etc (not sure if this is a legal thing but worth thinking about)
Lastly, know what is worth fighting for and what ia just being petty. Stick to your guns but dont be driven by hate.
The first solicitor I saw explained the base process for all of the above. fair but very "production line" Second was hard core - tried to get me to go after everything, house, his pension, spousal support, future earnings etc Third was more moderate - encouraged 50/50 on everything and was interested in minimizing impact on our kids.