how long should i practice with a metronome daily?

how many minutes or hours?

What are you trying to do?

If you cannot stay in time then all the time? if your trying to increase your speed and play at your max then i would not do more than 15 20 min, but i'm also not a shredder.

Well there's no real set time. If I were you, I would maybe create some drum loops to a few 3 or 4 minute favorite songs, and then play a long to them. Same outcome without the ammount of boredom you get with a metronome.

practice for hours till u can play master of puppets main riff up to speed

1 hour,shred licks with a metronome at slow tempo! then increase it gradually

Alex nailed it .. and as i have said before here and to my students .. "slow is fast"

IE: play the fastfastfast stuff at say 50-70 Bpm and wander around from 30min to 2hrs+

I would also add:
dismissing the 'speeding up' process for a week or so (till next lesson) and playing say, a long modal run (whole neck up-back) will do wonders for you tempo, accuracy, and speed (YES speed!)

RAWK!
Cs

Practice with the metronome for the entire practice time. If you ever go to a studio to record they will want to throw a click track in there (metronome) and have you play along with it. It makes editing much easier on the engineer if you can play in time with one. It also helps if you need to do a punch in. If you pay by the hour in the studio you will see how much money/frustration is saved by being able to play in time. I've recorded 3 albums at 3 different studios and I have my own studio and trust me...its all about playing in time. I get people who have never played with a metronome and track their part and say oops I messed up. So I say that we'll do a punch in a few beats back so he won't have to re-record the entire song. If he played in time its no problem, but if he didn't then he can't play in time with his self the second time around leading to a bad punch and a lot of wasted time and frustration. Then he ends up re-doing the whole song. Thats when I say, "do you see why I wanted you to use a click track now?"

You can drift slightly in and out of time to achieve a certain mood or feeling and it will be ok, but not much. The human ear can detect things are 'out of sync' at 10 milliseconds!

10 milliseconds?!

wow, that's something I never learned in biology class! lol

You should use a metronome when you are learning something new. I am a huge culprit of practicing without a metronome, and it shows in many of my recordings. I always fall out of time at parts of a song and you can notice it.

Start slow, then gradually increase the tempo. Practicing with a metronome also helps you learn the song, as you start to think of the song in time, instead of just in your head, associating movements with the "click" of the metronome.

I've Recorded over 6 Cds Lps 5 studios no click ;~)

click tracks are fer folks who don't lay down basic tracks (G, Bs, Dr)live. (read as - folks that do not have rhythem

thing is..if you play live with no click, having one disturb you in-session is agonizingly machine-like and unholy.

RAWK
Cs

@carlsnow

But if you practice with a metronome all the time then it isn't going to bother you any in the studio. Your project will sound much more professional if you use a click and are used to doing so. If you can't play WITH a click track and make it sound good and non mechanical then its because you don't practice with one enough. What I did for people in my studio was lay down a quick drum track that fit the song and then I quantized it to be in perfect time. It hepled a few who weren't use to playing with a click. It still didn't resolve all the timing issues, but made the punch ins to fix those issues a breeze and they are happier with their project.