The most important advice that I think anyone can get when embarking on a new DIY project is: "Don't Panic!"
A perfect example was my creation of a custom framed mirror. My wife and I couldn't find one at a retail location that had all the right qualities. It had to be the right size, color, style, price, and lack of ugliness. We found many that had on or two of these factors, but never one with3 or more out of the 5. So I declared that I could easily make one. Visions of slapping a mirror to the wall with mastic and then gluing molding around it danced in my head. She agreed.
3 days later after intense negotiations and molding shopping I was left needing to create from scratch a framed mirror that had its own backing "in case we decide to move it later". So much for "slapping" it to the wall with glue!
A couple days and many curse words later I succeeded in bringing "our" vision to life. Success! Kudos abounded! I was out of the dog house and living the easy life up town! Then she looked closer....
Turns out that in my rush to accept the accolades for my hard labor I had overlooked the small detail that during assembly the mirror had become warped, and I was now the proud owner of a low grade, nicely framed, fun house mirror. (Do the walls really bow out like that?) I tweaked and twisted and did a slight re-assembly with slight success, but in the end it looked like we were either going to have to buy clown shoes or drop a wad of dinero for a store bought unit.
We put the decision on hold and decided to let it hang through the holidays while we deliberated the wisdom of starting over from square one or going shopping again. This was the best thing we could have done. 4 weeks later, we have noticed that the mirror has straightened itself out! Apparently the glass of the mirror exerted enough pressure over time to overcome the slight warp of it's thin, plywood, door skin backing! We turned, faced each other and shook hands, commenting on how smart we were to leave it up and not panic into buying something else or starting over.
All your projects may not turn out just right, but never panic. Take your time to consider your options, and who knows, maybe you too will end up with what you want just by having a little more patience.