A good technique for adding a bit of structure to your life is this:
Set yourself small, tangible, achievable daily targets for the coming days (like "read 20 verses of the Qur'an on Monday", "pray Fajr in the Masjid on Monday", "go to the gym on Tuesday and do not leave until I've done...", "attend the weekly Fiqh/Tafsir/Hadith/etc class on Wednesday", and so on). Write all these targets down on paper so that you don't forget. For each target that you miss give yourself a little punishment (like "pay 50p to charity", "pray 2 Rak'ah optional prayer", etc). The key is to be strict on yourself but not too strict that you give up.
I must point out, however, this works for some but works against others. Don't use such a timetabled approach unless it comes naturally to you. Some people like to plan and get things done on time, others prefer a more relaxed ad hoc approach and thrive under last-minute pressure. Each person is different and you are what you are, and know best what you are. If the suggested technique works for you, refine it as required and stick with it. If not, seek a more fitting way.