I pick up my violin everyday and aim to practice 2hrs. If I can’t complete two hours I just practice silent vibrato exercises for twenty or so minutes before bed.
I used to just practice songs I was interested in learning like Canon in D, minuet, and over the rainbow along with a few scales in the beginning. But now, as per michaels suggestion, I threw in Wolfharts Étude no. 5 and haven’t gotten thru the third line yet. But I work by line until I’m in tune and scratch-free. I also get confused reading notes off the staves so I might make flash cards to get those memorized.
Re-learning the violin has become my relaxing tool/method as of two months ago when I randomly ordered one off the net. Practice is fun!