Advice needed!! TTC

Emma

Ok so I have 3 children already and my partner has 1. Last time we tried for a child we tried for a year then took a break. We are now trying again. I have my bbt thermometer out and alarm set every morning for 8am. I've ordered my ovulation sticks - not the clearblue advanced as don't have a regular cycle yet so no point. I have his and my vitamins ordered too.... 🤔🤔😂 any more advice. I've upped my water intake and he has agreed to try and eat healthier with me. Problem is he smokes - he has cut down a LOT (from like 20-30 a day to between 10-15 now). He was on a lot of meds that can ruin his fertility and so have i been so both going for fertility checks too (especially because i bleed irregularly between periods too)... any more advice???? How to up his sperm and increase my chances? Many thanks