Only aero mods i have is a 50% grill block and moon disk's. the rest is pure hypermile skills. what i see most people do is that they try different things all at one time. the problem with this is that if you dont see good results. Then you dont know what you are doing wrong. This are the things I did.
Learn your route first. figure out what lane is the less confused. On my route I found that the second lane is the best. the far right lane is to busy with people getting off the highway and on the highway. at these enterance and exits be ready for merging traffic into your lane. so leave plenty of space for them and you will not have to use any breaks. the worst case you have to push the clutch is and roll a bit.
Second try one thing at a time and be the most consistent you can be. this way you will see what the gains/losses will be. I fill up every friday, same time, same pump. the clerk will ask me every week what my MPG was. this takes time i know but is pays off in the long run. you can look at my full log and see.
Another good thing that helps is find an active person on here to get into a friendly competition with. try to best each other.
http://ecomodder.com/forum/showthrea...epa-18075.html
I hope you have a lot of time to read this thred