I usually spend the most time planning...cause I have to scale down..my first idea is always like "I will build the empire state building out of vintage lollypops hand colored by fairies"...and then after searching for a couple days for fairies with any coloring skills (all they want to do is frolic darn it!), reality kicks in and I start figuring out time/budget and my skill level (I tend to think "how hard can it be to (insert thing here)?"...ie "how hard can it be to learn to how to make stained glass windows? - I have 2 weeks - I'm sure I could learn and make some amazing cathedral style vintage glass for my partner in that time"...no Clarissa...no you can't...it IS that hard, and you have no supplies, no skill and no time...
And then I think of something that I can execute awesomely and off I go~!
Spent yesterday morning scouring thrift stores for just the right "trash" to turn into treasure ;-). (Is it just here, or are thrift stores everywhere starting to price their trash like it's already treasure?)
Not just "here" (where ever here is), but here in California (which may be where your "here" is too), it's like that too. takes some of the fun out of discovering something awesome, if they end up charging an arm and a leg for it.