PubMed's My Bibliography page allows you to add citations for your own publications to your My NCBI account; you can choose to make your bibliography public. You can also export your citations from your My NCBI account.
To get directly to your My Bibliography page, login to your account. Click the My NCBI logo in the upper right corner, then select the Publications (My Bibliography) link.
To add citations from a PubMed search results list, select the citation to be added by clicking the box to the left of the citation, then click the Send to drop down menu and select My Bibliography.
To add citations from within your My NCBI account, click the Manage my bibliography link in the My Bibliography box.
From the My Bibliography page, you can add citations from PubMed, a file (upload Medline or RIS formatted file), or manually (use My Bibliography templates to create citations for publications not found in PubMed).