I usually manage to practise piano for an hour each evening when the kids have gone to bed, plus the odd few minutes snatched here and there during the day.

My routine comprises:

Warm up with exercises (Hanon at the moment) and a few scales - about 10-15 minutes
Piece(s) currently being learnt , currently the andante from Mozart's piano sontata K.545, about 30 minutes
Remainder of time sight reading, from my collection of easier pieces + playing anything else I feel like!

Would be interested to know how the rest of you approach your practise and any tips.

Hello
Same as you but I do a lot of just sight reading over and over as much as I can. That has helped my playing a lot. I believe this to be the key as many people just seeem to play their set pieces and can't do much more. I will be dissapointed if I cannot pick up music in the future and play it straight off or at least almost straight off.
BFN MIke

I try to practise at least 2 hours a day...
Normally I pratise until I feel satisfied, tired or until my back hurts without strickly consult with the clock.

My routine
-Scales, Chords, Arpeggios (my teacher makes a list of them for me to practise each week) (1 hour at least, in different tempos)
-2 pieces my teacher pick for me
-2 pieces from the piano grade exam book

I try to do 1.5 hours every day, starting with scales & arpeggios, then at least 15 minutes' sightreading, followed by pieces (at the moment they're the three exam pieces I'm preparing for grade 5).

Later in the evening I might do some more sightreading (mainly of hymns & organ music) on my electronic keyboard - but this depends on how tired I am by then!

I do a half hour of voice practice formally, but sing a lot during the course of the day. About half an hour to two hours of guitar, in the evening, once my daughter's in bed, and I've finished any left over work I've got to do. I don't get to the cello every day, as it's such a loud sound, I feel uncomfortable practising at night, as I don't want to disturb my neighbours (and it's still sounding very much like a strangled cat, so I'm sure it WOULD disturb them!).

My problem at the moment with practise is that I work full time, and am completing a doctorate. Once my phd is done, I hope that I'll have a bit more time for music practise.

I have my own personal daydreams and goals when it comes to my piano playing. So I do about 20 minutes of scales, broken chords and arpeggios. Work through the few pieces that I'm working on for an hour or so, then my favourite - I do about half an hour of improv. Most of it is utter poop, but sometimes I hit a few chords and strike a melody that sounds halfway good. A bit of this for me every day has really helped learn what sounds good together and how to change key nicely etc. It's not a recommendation, but I enjoy it. Of course, I'm sure just about everybody picks up their instruments and just plays with it

Now that I'm an unemployed layabout full time musician, my practice routine's changed a lot.

One session, morning and afternoon (unless I'm busy teaching or performing) which consists of

1/2 to 3/4 hr piano
25 to 30 mins violin
25-30 mins recorder
3/4 - 1 hr singing.

more than this and I'm too tired - these are the limits of my stamina for each instrument. Also, note that I never do the maximum on all of them at once, and I often vary the order I do them. But it works for me.

I used to be very precise with my practice to the point of being a little obsessive. I would aim to do 2x30min sessions and these would be timed. When it came to the end of the 30min, I would stop no matter what I was doing and that was that. A little wacko me thinks.

Now, I just sit down at the piano when I feel good, play, practice, scales or whatever I feel I need to do and I enjoy myself. I stop when I feel I've had enough.

Shelton

Now have to find space to practice trombone, as my lovely partner bought me one for christmas....

When people start to literally time their practice - and I have plenty of child pupils who do this - I start to question whether they are really wanting to practice because they enjoy playing, or whether they feel it's something of an obligation to do a fixed amount.

It is always better to split up practice into two or even three chunks, but allow your body and brain to tell you when it is starting to tire rather than timing it to a precise minute. Timing practice sessions by the clock will never really let you concentrate on the music, or indeed on what you are trying to achieve, you will instead be clock watching to ensure you don't overstep the allocation!

For those who have the time or can structure their day accordingly, maximum benefit from practice can be achieved by: a practice session as late as feasibly possible in the day, followed by a session as early as socially possible the next morning. Add a session in midday too. This way the muscles are being kept mobile almost continuously and hence avoiding the seizing up period in between. Think about the routine a dancer or athelete might have. Any really lengthy periods between stretching or exercise, would actually mean harder work.

Since I don't have a piano at home and need to practice outside, my practice time is also affected by the opening hours of the company. During working days, I usually practice for 1.5 hours (after work). On weekends, I'll practice for 2 - 3 hours.

My practice routine is like this:
1. Scales, appregios & broken chords as warm up
2. The 3 exam pieces
3. The new scores (usually 2) which my teacher assigns to me

I admit that I don't pay extra time in practising my sight-reading skill. So, I think I'll need to add that in my routine too!