That's very true. Links which you create yourself are regarded as worthless by search engines - and that includes most of the suggestions on your list.
Reputable sites will mark user-created links as nofollow, in accordance with Google's guidelines, as we do here.
Creating links with the intention of manipulating search results is a violation of search engine guidelines, which may result in your site being penalised.
Among other examples there, Google specifically refers to
Large-scale article marketing or guest posting campaigns with keyword-rich anchor text links
as behaviour which can result in a penalty. Other search engines have similar rules.
For a press release to be of any value, you need to have something genuinely newsworthy to share.