If you find that you are not improving as quickly as you like or that you are bored with your routine there are two things you can do.
Firstly really focus yourself on your current practice routine and try to complete this as well as you can with as much concentration as possible.
If this does not work, and assuming that you are concentrating when you practice you could try making a change to your routine. Making a change means that you will still cover the same areas as before (scales, studies, pieces etc). What you will do differently is to choose new exercises to practise. For example if you have been practising your major scales up and then down you could try doing them down then up or maybe in thirds. If you are practising fingering perhaps you could do some different patterns or different keys.