This was last week. But the issue has not gone away, so blogging about it now is not too late!
Lots of names for aspects of the topic - venous thrombosis, venous thromboembolism, VTE, deep vein thrombosis, DVT, pulmonary embolism. Searching NHS Choices for thrombosis links to resources about many of these, and each page links to information about causes and treatment, as well as information on trials and personal stories.
World Thrombosis Day itself has a page of resources. This includes information about the the global burden, hospital associated VTE and about research into public awareness. There are campaign materials, including a list of research articles for health professionals (although the Clinical Librarian Service would be pleased to conduct a specific search for you). Under Campaign Materials there are also personal stories.
The International Society on Thrombosis and Haemostasis is involved in World Thrombosis Day, and it publishes the Journal of Thrombosis and Haemostasis (some content freely available, some needs a subscription).
Other resources include:
British Committee for Standards on Haematology - guidelines on thrombosis, accessible via the BCSH site but also through NICE Evidence Search, which will also help you locate guidelines from other organisations.
Using NICE Evidence Search will help you find NICE guidelines, but NICE's Pathway on venous thromboembolism gives an overview of NICE guidance and links to publications.
Clinical Knowledge Summaries includes deep vein thrombosis, pulmonary embolism, and DVT prevention for travellers. All are written for primary care, so do not cover prevention or management in hospital.