Actually a tool for literature management, zotero is also a very suitable tool for PKM. Integration of documents is very easy. Only downside: no integration of mails.
I've lost 10 kg in three, four weeks eating raw vegetables. You can eat very large quantities of vegetables, and you can use large quantities of olive oil without negative effect on weight loss.
Peas, chickpeas and lentils are very strong protein sources, no problem. Athiopian and arabic cusine is very good in legumes, very tasty!