Read the following 10 ways to improve your portfolio without really trying, and explain why it is sensible or not sensible as investment advice for the average investor from a theoretical perspective?

1 Use tax wrappers to the full

2 Reduce your platform fees

3 Cut back on fund fees

4 Go passive for the core of your portfolio

5 Check overlap on your holdings

6 Ditch smaller holdings

7 Add a diversifier

8 Add an investment trust

9 Add a dividend hero

10 Take on a bit more risk