Well, thank you all for answering and encouraging me.
As Jorge said, I have about 800 kanjis, and have already gone through this problem before, and I've lost interest not in Japanese, but in doing the kanjis because I feel as though it is more work.
However, I think that you all might be right in saying that it is necessary work.
Burritolingus, that idea of timeboxing is interesting. I did something similar before, when I was working on some math homework and every five problems I did five kanji. I ended up doing 40 new kanjis and not feeling tired or anything. Afterwards, though, I would take longer and longer breaks and would do fewer kanjis. Maybe if I read more on the idea, I could be more rigid about it.
welldone101 and bombpersons, I will certainly look up into this RTK Lite, as it seems interesting.
crayonmaster, I like your idea a lot. I am a huge bookworm, and would love to read Japanese fluently. I will certainly give it a try! Lately, I've been surfing for sites that are only in Japanese. I found an art site that sort of reminds me to deviantArt, pixiv, which is pretty cool. There, I've actually learned some new things, but I don't think I would have been able to do this without RTK.
mafried, that is an interesting suggestion. I like it too. Again, I'll definitely try it out.
AmberUK, I agree with you, there should be a frequency list in the site, as well as the student vocab list. I often wonder which is the way the Japanese learn their kanji, and how they are distributed through grade level. Well, the reason I got started on Japanese was actually because I proposed to Jorge that we should learn a new language, as it would be pretty beneficial. I actually started on Greek, but then he said it wasn't going to be that useful, so we got into Japanese. After wards, I realized that Greek wasn't as good as Japanese, and that there are more Japanese things that I like. I now want to learn Japanese because I think of all of the material and media that will be available to me if I do. There are many books that aren't in any other language but Japanese, and would love to read Japanese poetry in its original language. I'm also a huge fan of anime and manga, but I don't want to depend on subtitles or translations. I also like the idea of learning a new language; it is motivating to hear people speak a language that you don't. At least for me, I find that when I listen to jpop or jrock, or anime, or read manga in Japanese, I feel this desire to truly understand. This is one of the prime motivations for me in why I want to learn Japanese.
Again, thank you all!