No technique, really. Just fold yourself up into the floorboard and have at it. Couple of notes: You spotted the clear fluid in the floor, make absolute certain the main brake line (Front-Rear, I mean) is not leaking anywhere. I've done several master cylinders in the recent past that were bought by owners and brought to me. After replacing them, I've still got no brakes and find fluid in the floorboard around the driver's seat. Check mainly around the hold-down clips that hold the line against the frame tunnel. One tip I can pass on, start the 2 bolts first, then get your lines started. It makes it easier getting the lines started if you have a little give. Once they're about tight, go back and snug down the hold down bolts in the firewall. Then, go back and tighten the lines. If you don't have line wrenches, I'd highly suggest getting some to avoid rounding off the ends, but get good ones. Affordable/good quality ones for the money are the Polished/Professional Craftsman ones at Sears. Beware the cheap ones, they tend to flex. As to longevity, I personally believe that the new ones are better than the reman ones out there, but nothing comes close to the original stuff. Can't tell you how many 30+ yr old master cylinders I've replaced. Probably as many as the 3 month old Brazillian ones. Good luck.