Well there is really not that much to it.
Just fit a launcher. Normal one is about 600sec base time. or fit one from sisters of eve. those have a basic cycle time of 450s.
Covert Ops Cloaking Device II one of those, very important else you will be cannon fodder.
A pair of Gravity Capacitor Upgrade I rigs to decrease scan time even more.
i have 2 cargoextrenders as well, just to bring more probes, but it doesn't really matter. i use it because i scan all sites. even sites i don't use. i just contract them to corp if i find them. there is always someone that wants it.
also fit a cargo and or survey scanner. so you can check if it's worth to get another ship to clear site.
then there are some implants that decrease scan time. dunno what ones to be honest, didn't really bother about them. since it doesn't really matter anymore if you have sisters launchers and high enough skills. it's only a few sec 4-5 in difference.
- Astrometrics IV you need this to use probes
- Signal Acquisition with this one it's the higher the better. decreases scantime\
- Astrometric Triangulation as high as possible. the higher this is the greater the chance you find something
- Astrometric Pinpointing the higher this the closer you get to target. so you need less probes. less time wasting in searching. also very important in recon scanning.
then you might want to get hacking for radar sites and archeology for magnetrometric sites. the second one is very hard to find though. so i wouldn't bother as long as your skills are not at least iv.