1)get a diagram as mentioned above on your car and study it....because youll have possibly several ground/or positive leads to connect ,etc and knowing in advance will simplify the installation.
2)plan out componet placement ie; siren, shock sensor (put where you can easily adjust it),brain,etc.
3) hook up everything you can, ie; door switches- dont rely on dome light voltage sense. i always add trunk and hood switches too.....
4) take your time plan on all day if you have to.follow the instructions.connect one wire at a time.
5) hide the alarm.....how good is it if someone can look under your dash ands UNPLUG it?????
6) some hate electrical tape,but i love it and every wire/alarm harness gets wraped...why? to hide the wiring,make it look like stock
good luck take you time...and make good connections...99% of my bussiness is finding/repairing bad/loose/connections....