Patience, patience, patience.
These indy tracks can set a person back a bit.
Get yourself a really good straight edge and expect to do a little bit of planning. It depends on which vehicles you are working on. Are the tracks going to sag? If so, where?
What I do is measure the distance between 2 points on the roadwheels. Using the straightedge as my guide, I will build a run of track links. I will repeat this process until I have 4 - 6 sections of track built up per side of the vehicle. After painting the tracks and weathering the tracks, I start to install them onto the suspension one run at a time, constanting measuring and dry fitting until I have them all in place.
Another option of course is to purchase after market tracks for your vehicle, but I'm just too cheap to let a perfectly good set of tracks escape. LOL
Happy Modelling and God Bless
Robert