The first thing is that you don't have to do scales. This is the worst attitude you can have. You have to wait until you want to do some scales. Hopefully, since you are here, you want to do some scales. My next suggestion is to make them a part of your warm-up routine. You don't have a warm-up routine? Well, now you do! Now for warm-up, you can quickly run through each of the modes of the major scale (or some other scale you are trying to learn. If you screw one up, do it again. This should only take you 2 or 3 minutes maximum, and this is the best way to learn scales: repetition. But this repetition is not boring, it is fun. This way you are not consciously repeating scales over and over; you are consistently doing scales every day, which becomes weeks and months and soon you have these scales down by heart. And I mean by heart because if you want to solo in a band, you had better know your scales. But if you designate a short amount of time each day to scales, you will learn them. And you won't get scale overload either.

Scales are the time to work on other things also. Electric guitarists can work on alternate picking (picking up and down while playing), and fingerpickers like me can work on picking with all your fingers. You can work on your tone, on your fretting, and especially on your speed. Once you know these scales cold, the only thing left is to play them fast. And I mean lightning fast. So this is a time to work on your tone and picking while playing fast. You can pretend this is a race. But it's not a race for speed, it's a race for speed only when you like the sound you are making. The sound is very important here as well. So concentrate on tone and fretting, and you will soon be appreciating scales not only for what you are learning but in regards to how it is helping your playing. The other night I sat down and played modes over and over for half an hour, just working on fretting and picking and seeing how crisp and clean a tone I could get. I was not bored, it was exciting to know that I was improving my guitar playing from it.