We all prefer to practise some things over others. The trick is to make sure you practise them all.
For this practice method you will begin by practising your least favourite thing first (don’t tell me, it’s scales isn’t it?!). After this you will then move on to your next least favourite and so on.
When you have finished your practice you need to ask yourself honestly if you have done a good practice session. If the answer is yes then treat yourself by playing your all time favourite piece.