Using your burn increase will make your signal huge! Cut it off, keep out of view of your destination, make sure no fleets are around you at all will see on radar ( i think that may be mod ) and activate the go dark, if a ship was within sensor range of your ship when you do that they will hunt your general direction, just take evasive manuevers outside of that 90 deg angle from them looking at you.
As mentioned belts are a great way to reduce your signature radius alot just make sure your burn is off, ships with engine d mods can increase your signiture radious ( check it will tell you if it does ), also bigger ships means bigger sig so be wary of that too.
Some planets like say jungala are a pain i the arse to get into like that, too many patrols, if you must go to one of these kinda places then you gotta wait for their patrols to go deal with an issue but then its a time game, they can turn right back round at full speed right at you to patrol the planet again .....
Good luck!