After 2 years, I'm pretty sure it can no longer be accurately classified as "procrastination". It really must be called "severe mental block."
Two years ago, I removed the sashes of one of my upstairs windows. I promptly refurbished the hardware. I stripped both sashes down to bare wood, repaired any damage, removed the old, wavy glass, cleaned and rebedded the glass, reputtied the glass and repainted the sashes. I bought the sash rope and oiled the pulleys. I stripped the interior trim of it's lead paint & repainted it.
Then they sat....or rather leaned against the wall upstairs. For two years. I occasionally dusted them and thought about how I really should just reinstall them. And they sat some more. The funny thing is that I fully restored and reinstalled a number of casement windows during this time.
Well, a combination of pure holiday vacation boredom, -10 degree weather, and shame finally motivated me to reinstall the sashes. It took 45 minutes. They look quite nice. If you look closely, you can see the bronze v-channel weatherproofing in the channel of the lower sash. The windows (upper & lower) operate with one finger :-) They keep out the cold. They will last another 100 years. I can't explain the hold up in installing them.
I still have to remove some stubborn spots of paint (yes, I see the old paint in the heads of the hardware screws & the sash channel) and add the interior stop.
I really, really enjoy rehabbing vintage windows. Once I get my photos in order, I'll post about the entire process I take.