Today might be a little bit easier for you. For your 15 minutes of decluttering today, go through your stamps and choose the ones that you ABSOLUTELY MUST KEEP. Now you still need to be pretty ruthless when you do this. Look at each stamp that you THINK you must have and ask yourself WHY?
Why is this stamp worthy of the keep pile?
Do you use it constantly?
Is it your go-to stamp?
Is it one that never ever goes out of style (sentiment stamps involving holiday saying for instance)?
Does this stamp have special meaning to you for some reason? My stamp sets from the trips I've earned and Close to my Heart conventions fall into this category. They are unique to that event, will never be made again and can be used both on cards and on my scrapbook layouts for those events.
Is this stamp super useful (alphabet stamps fall into this category)?
That's about it, yes THOSE ARE THE ONLY good reasons to keep a stamp as a need. All the other stamps are WANTS!!!
Once you have finished with your absolute must keeps, put all the rest in a box, no NOT to give away, just to sort later, after the 30 days are over. Take your must have's and put them in a nice pretty container and we'll move on tomorrow.