How to invest in SEO correctly?

[ahsanhabibcx]

Hi, I have just made a site and want to invest some money in SEO of my web.
I see the next budget split:

• -Content writing.35%
• - Link building on top-tier websites 30%
• - Guest post creation 15%
• - Technical SEO optimization of my project 10%
• -Social marketing 10%

What mistakes should I avoid?

Thanks.