These are the 10 strategic mistakes one should not do at Twitter as it may harm your online personal branding in future. At the starting is not following your interests and following back everyone who follows you. If you make the mistake number 2 you will probably lose the existing followers.
Mistakes 3, 4 and 5 are regarding your about your profile. No. 3 is Never use a fake photo or worse no photo at all. The 4th mistake is irrelevant twitter name and at 5th place is the mistake of having no bio.
Next four mistakes are related to content you post and messaging part. The last mistake one should not do is only posting texts and no photos, videos, and links. So that you are not tagged as boring person.