This has plagued me for quite some time now and I'm curious if any of you know how to deal with it.

Basically, I have this feeling of tension, which demotivated me, which comes from a sense that my thoughts are "stuck" or static, like I was extremely attached to my ideas or plans. Now, I need to be attached to my plans so I could do them, but the attachment itself feels extremely lame. I also get frustrated by thinking easily.

Note that I don't think meditation, hypnosis, pills or food, or even exercise can help me with this (exercise actually makes it like ten times worse, I get ultra irritatable). Also, this applies to doing even the fun stuff, I get bored and mad at everything, until all I want is to lay in bed and do nothing. I get into that "fuck life" mindset.

I'll try to contribute on the forums and I hope someone helps me out here.

This was all very normal for me, and when I get anxious, I slide right back into it.

So listen, medicine tastes bad, and that makes you not want to take it. Anyone here that know better than be is welcome to contradict me, but meditation or "mindfulness" as a practice is designed to combat exactly your problem, to the tee. You don't think it is for you? You are wrong. You've got a runaway brain and don't know what you are talking about.

I'm making a harsh appeal to your intellectual brain instead of your misfiring emotional brain which doesn't want to take a yucky medicine.

IMO, the best thing subsiquent poster can do is keep it simple and sound off helping to drive this single point home.

I feel like I just need to chill for a while. Meditate, watch videos (nothing mentally active, I feel making decisions makes it worse) etc..
I can't understand why. This is why I didn't think the usual would work.

Any opinions about why this happens?
To me it usually happens when I do a lot of mentally straining stuff or plan to do something big. This could be ego depletion (but sugary food usually helps with that, not in this case) or this could be some sort of an emotional/mental thing that clears up when you do nothing.

Meditation isn't easy. Think of your attention as a muscle, and you need to practice focusing it. Your mind is out to shape, you need to train it.