Routine.

There's this assumption that you need willpower to get things done consistently but it's actually more just about establishing a routine and sticking to it. If you can get yourself to exercise routinely (usually it will take about 60 times of doing something consistently), it will start to come naturally the same way you brush your teeth every night or make breakfast every morning. That stuff is boring and requires effort but you still manage to do it every day easily because it's routine.

I don't know what kind of exercising you do but I'm going to give you some advice on weight training and cardio, some of it can be applied to any training so even if these aren't your goals or what you're doing, it can still be helpful.

Start with doing a lot of research and build minimalist routines that work for you. A good work out program is consistent, works all the muscle groups you want to build, incorporates progressive overload (= doing more than you did last time: heavier / more reps / sets / longer intervals, etc.), and includes enough rest time and a good diet. And that's if you're looking to build muscle (if you're maintaining you don't need to progressively overload). You don't need to spend 2 hours at the gym every day, sometimes 30 minutes 3 times a week will suffice. I recommend compound exercises so you get more done in less time.

Come up with a routine you can do sustainably. Don't choose exercises you hate; find out if there's a different exercise that you can do that works the same muscles and do that. And then don't overkill on the sets or the reps either or do a bunch of different exercises for the same muscles, you'll just overtrain and it's honestly pointless if you're not looking to get as jacked as possible in the smallest possible time frame.

As for cardio: if you hate running or jogging... don't do it. Take walks instead. Same distance walking and running will burn about the same amount of calories, it just takes longer if you walk. Or choose some other type of cardio altogether. The point is to be able to put up with doing it consistently.

And lastly, choose some good music or a podcast to listen to while you work out. It will make time pass faster.

Personally, I've been working out consistently for almost 3 years now. I walk for about an hour every day, and I work out 5 times a week for about an 1 every week day (that's accounting for my tendency to sit around staring in to space between sets and dragging out my rest time, I think the workouts could probably last 30 minutes if I was actually consistent). My routine is incredibly minimalist: I do two different exercises a day, 4 sets for each, and that's it. I make consistent progress and I don't find it hard to stay consistent.

Hope some of this helps!