I belong to the Telegraph online crossword society and I get other crosswords on-line too. I send for some of the charity quizzes - the ones which have cryptic type clues - and I do on-line sudokus from time to time. I can't really get into crossword books - too many at once, I think
Newspapers and on-line. Well-meaning relatives have bought me books in the past, but I find them daunting: I think something in the head says that I have to do all the puzzles at once. It can also be tedious to get stuck on one compiler or style of crossword.