I haven't bricked my I8000 as yet (fingers crossed I won't), but I'm creating this thread because I've noticed a number of users on this forum who sounds as if they have bricked their phone after a flash. I remember a thread like this was created in the XDA-Dev forums, and they were most useful, because it provided you a single place to go when your all panicked and worked up over your broken phone.
Basically to get the ball rolling, a tip:
When you flash your phone, don't flash the eboot/phone part (credit goes to Sorg for this) if you don't have too. Those are the 'dangerous' parts that brick your phone. Only flash when you geniunely have too. Also, I find that you need to flash eboot and phone in tandem, because the phone component is more tightly integrated with the eboot. Sometimes different eboot's won't work with different phone parts.