1.) Okay...first way to save money, plan to do it myself. I'm not the handiest of guys but I do have patience and can really analyze my situations.
2.) Research - query the heck out of this site and read user opinions on budget projectors, cables, DVD players, screens, etc. Go to Best Buy and Circuit City websites and read ALL the customer reviews, some of them are useful and some I will take with a grain of salt. Opinions are that...opinions, I was just looking for facts.
3.) Shopping - find reputable dealers online, in stores, look at warranties, compare prices and see what I come up with. Quickly highlighted any product that folks claimed on here as 'bang for the buck'.
4.) Be smart - do it right the first time, take my time, read instructions thoroughly, time is money and mistakes costs both time and money.