I refuse to allow myself more then one peak of mudcat a day, which lasts about 1/2 to 1 hour. Now if I could be that disiplined about practicing my mandolin.
When I do make time to practice I generaly spend 1/2 hour a day, maybe an hour (but not all at once) And I did make a lot of progress last night in that half hour, if only I don't forget what I've learned.