It’s a good idea to practise in several short concentrated sessions rather than one long session in which your mind is wandering. Unless you can train yourself to concentrate for long periods of time, try splitting your practice sessions into three roughly equal parts:
Technique (scales, arpeggios, patterns)
Sound (Tone exercises)
Tunes & improvisation (This can include just noodling around)
It might be useful to just do 5 or 10 minutes of each then take a break and come back to it. The important thing is to stop practising once you lose concentration: less time spent on concentrated practice is better than more time spent practising when your mind is on other things.