Try this useful technique for IELTS writing and speaking:
Give an opinion, then follow it with a conditional sentence.
Look at these examples:
- In my opinion, governments should invest more money in public transport. If rail and bus services were more reliable, fewer people would need to drive.
- Schools have an important role to play in children's health. If schools banned junk food, they would help to reduce the problem of childhood obesity.
- In the future I think more people will do their shopping online. But if Internet shopping becomes more popular, many traditional shops will lose customers.
I've underlined the conditionals. Examples 1 and 2 are second conditionals, while 3 uses the first conditional.
Prepare your own "opinion + conditional" ideas for different topics. Having a few of these ideas ready could help you in the writing and speaking tests.