Well, I am a bad example, but when I want something I draw a list of stuff I 'need' before stuff I would like. Say I have 1 guitar, 1 bass, and a bass amp. Next was a guitar amp (a Mark V). Then I picked up a second 6'er. Now I am getting a 7. I could use a backup bass incase I start playing out again (I am a bassist), but my amp gets me buy. If I was playing out again I would probably go for a bigger bass amp. I have a 100W/Chan amp, and it gets band practices done, and small venues.
Here is my tip of the year though. DO NOT BUY INTERMITTENT/TRANSITORY GEAR. Only buy the real stuff, that you dream of at night. Everything else will only slow down getting that dream gear. I don't buy middling guitars, as I know they can't sit beside the ones I have, therefore will not get playtime. The most important factor being comfort while playing ofcourse.
I am currently in a recording drought though, which kind of defeats why I bought a Mark V, but I just cannot put the time I need together due to my research. Same reason I am not currently playing out on the bass. I certainly don't need my Mark V, but I sure as hell enjoy it.
Guitar techs are for sissies.
Learn some damn music theory, don't complain, and you'll be a better person. -Schecterwhore
Show me a truly awesome guitar for under $1000 and I'll show you hateful lies.