How did you turn your plateau back into a mountain?
i think you are up against a simple nostalgia problem. nostalgia gets us again and again, and it goes in waves. soon you will realize that anything you've ever done is no more 'special' than any new thing you can now do. and the things you did then were once things you had never done, where perhaps back then you were emotionally attached to some other previous thing. you will eventually get out of this by just putting on your hustling cap and doing whatever you can, do many many many things, just jump in and start going crazy. the bad news is you will probably have nostalgic feelings later for this, looking back. and then you just repeat the cycle