While there are some exercises using a metronome that can be useful, there is a lot to rhythm and having good rhythmic feel and good time beyond the metronome. The “RHYTHMIC DEVELOPMENT and PERFORMANCE IN 4/4” volume (3rd volume of the rhythm book series), discusses “hide the metronome” exercises which are perhaps the best (the book also discusses non-metronomic time in various feels). I have often seen discussions e.g. on facebook, in which someone writes “rhythm is important” and then all the answers are about playing with a metronome - it strikes me as parallel to someone saying “melody and pitch are important” and then everyone replying “yes, i use a tuning fork” - it simply misses almost all of the topic. Caveat: if you are only using a metronome to measure how fast you can play 16th notes, this post is irrelevant to you(!). Regarding a couple other things people posted: if you are playing any kind of Afro-centric music (i.e. anything that has roots in African rhythm, with steady pulse and groove - jazz, funk, rock, Brazilian, Afro-cuban, hip-hop, reggae, etc.), classical music is not the place to look for this. I also smiled that steve506 posted a Carol Kaye video, since I used to play in her band - she is 91 years old and still posting on the internet! I know many here may not be interested in getting into rhythm deeply, but if you are, I suggest you check out therhythmbooks.com (the series has more than 2,000 supporting mp3s online, as well). For those who are only interested in metronomes, try “hide the metronome” exercises.