Resolutions for the new year

We always talk about making plans and resolutions at the beginning of a new year and oftentimes [we use 'often' in Britain] that involves exercises and financial plans. Sometimes [comma dropped: you want 'sometimes' to go with 'depressing' but not with 'because...', whereas your comma was making 'sometimes' go with the whole of what followed] talking about resolutions is depressing because we might be wondering how this year would be any different if we hadn't reached the same goals ['resolutions' is plural] before.

We seem to be standing at ['on' isn't wrong but it's unusual] the bottom of a big mountain looking up to the summit while being a little hopeless. Several months into the new year, the resolutions tend to fade away. The clouds of confusion and self depreciation block the once-clear summit. Making resolutions is very common ['prevalent sounds awkward, maybe partly because usually it's a thing that's prevalent, whereas you have 'making' as prevalent] but people are not always doing it right.

Most people tend to exact/inflict big promises upon themselves ['made... on' is odd!], who are trying to hang out a big cloud above their heads [not sure what that sentence is - it needs some work!!]. The feeling or illusion of "I'm capable of multitasking several big projects" by setting complicated and difficult goals makes people feel good. With time, when the reality has set/sets in, people get frustrated and disillusioned, while ['while' has to connect two things eg 'X while Y' or 'While X, Y'] other people who make small resolutions or don't make any resolutions, who still keep going forward. Therefore, it's all about how people consider their bucket list and have it come true.

I never made resolutions; rather, I always found the best method when I was young was simply to tell myself throughout the year "at some time I will..." (or similar) without any force, and then in due course I would find myself ready to do it.

Your English is pretty good :) - d