The only advice I can add that has not been given is:
Get to an area you want to still hunt, then Still hunt it. Walk in when its dark or mid day, get to where you think a good starting point is, then start hunting.
Try to plan a route based on wind direction but also I try to keep cover close by. sometimes I hunt through thick cover just to keep hidden. Still hunting through open woods will make it easier to be picked off.
dont spend time in areas you can get busted like ridge tops, dont silouhette yourself and try to stay in shadows. I try to stop by trees. this way I can lean and try to give my legs/feet a break but also give a little cover.
Tom, It sounds like your second attempt was much better, as Charlie said, you will get better wth practice.
Also, dont forget to look around close to you. you will be surprised how many deer you can slip into 15 yards of before they bust out and make you poop your pants.
Noise is OK as long as you are not a Human or Mountain Lion.