I am tired of all the clutter in my room. I spend nearly all my time in it and would like to learn how to be satisfied with a moderate amount of items. This is an ongoing issue in my life and I want it to stop.
It's not an awful hoarder situation, I just want to reduce clutter. But people always give me stuff for no reason. I try donating as much stuff as possible, but most of the time I really like what they got me and want to keep it.
Additionally, it's very difficult to give up items from my childhood because I feel like I'll never find anything else like it or may forget something.

Any advice on how to just let go of stuff?

A wise man once said....
.... just do it.

Have you used it in the past week/month
Is it expensive
Was it a special gift from family/friends

If all questions are no then donate/throw it away, if everything is no except for it being expansive then sell it