I've just started my PhD. You've probably just started yours. I'll put some links below which might make our life easier a bit by learning from the people who've been there already. However, some links are quite generic, the list is mostly biased towards computer science/engineering/math.

Have a link? Please, share it with me. Find the page useful? Spread the word =)

General Tips

Anki

Writing

Giving a talk

Peer review

Time management

misc