All the time, I usually just end up scribbling different things or trying to learn actionscript.

I always thought that looking for motivation would keep me going. You know, watching movies, reading books, listening to music.

Unfortunately that hasn't been working.

Demotivation?

Usually im motivated to do something cool but at the end, my expectations were too high, so i end up doing nothing....

but sketching should work, do a lot of sketches even if they are completly random, you can come up with something interesting that way, then when you finally have something concrete you can start using flash.... sometimes going directly to flash is not the best idea, you have to build up your thoughts before hand.

it always happens to me.
and the lack of response when i actually get something done,
is even more discouraging.

If you work hard on something, it will pay off. Even if you don't get good response at first, you can only improve on your next. There is no way you can get any worse by making more movies and practicing really.

Motivation is a big issue, what tends to work for me is I tell myself, "Hard work will pay off and the more effort you put into it, the more it will show in your animations." Just keep thinking about how awesome it'd be when its finsihed... dream big!

Watch either Waking Life, Paprika, or Spirited Away, then meditate for a little while. Works for me I guess.

Fuck motivation.

At the moment I just work on whatever part interests me the most at that particular time. Then once all the fun stuff is done, I can fool myself into thinking that it's only a "short" grind putting the pieces together until I have the project completed.

I find that if I go looking for motivation in other media, or inspiration as it sounds like you're describing, I end up taking things in a direction completely different then I meant too, and it becomes more unoriginal than I intended to begin with.

But since it's not so much the coming up with ideas part anyways, you pretty much just have to push yourself to get things done. Support and feedback from people are major, but you have to find your "zone" too. Usually the less stressed someone is, the more in the "zone" they're in.

Also something I forgot to mention: If it's positive feedback you look forward to the most, you have to have passion for what you do. If you can't feel passionate about your work, how can the viewers feel the same too?

Well, I, being a somewhat-famous Pivot animator, run into the same problem. What I do is, finish up my current animation and start another, doing nothing but re-doing it, and re-doing it, and so on. It calms me!

Also, for you fans of my animations, I'm working on turning the .piv files to .swf files so I can put them on here!

Everytime I want to get through that mentally barrier, I do some meditation at first, focusing that this coke/redbull will give me motivation and inspiration to keep on animating, then I drink the coke/redbull. ;)

It DOES happen a lot.
But you sir, are very good at making very entertaining flashes, and you need to MAIKMOAR(tm)