Weight loss help? Please?

Jade
Hi all, 
I'm just posting really to see what tricks and tips you have up your sleeve when it comes to losing weight (if you have any!). 
I'm due to start my first round of IUI early next year but my BMI is just over 30, so I want to bring it down a bit before I start so that I can make the best possible home for my future baby. 
Is there anything you've found that really helped you? Is there a certain exercise/workout that you do religiously that has worked wonders? Anything you can suggest would be greatly appreciated! ✨