I've gotten to be a master declutterer. My mom was/is a hoarder. I had to clean out her house when she was moved to assited living and I swore I'd never let that happen to me or inflict the clean up on someone else. I've found with sentimental things like clothing, if I photograph it I'll keep the memory and be more likely to get rid of it.
You can also put things in a box, tape it shut and put a date on it. If you havent' taken something out of it in three months, off to Goodwill. Don't open the box!
Things are just that...things. They have no feelings or emotions. They are of no benefit to you if they are bogging you down and weighing on your mind.
I also like watching Hoarders on A&E. I usually pause it in the middle to clean out the fridge or toss some junk mail!
I also joined The Clutter Diet forum and it's very helpful.
Baby steps. Good luck!
C