find scanner upgrade model S for multi-tool, ( S class analysis visor upgrade) This get you insane money for s=canning anything. Literally 6500% increase on plant rewards. I now make around 20,000 credits for scanning a plant. Upload your discoveries for extra rewards.
Put like minded upgrades next to one another for bonus. This works for all upgrades, shields multi tool and ship weapons. Sometime its hard to tell what will get bonus but things are kind of color coded. Once they are placed there is outlined box around all such upgrades getting bonus.
save manually every now than or after big events. I usually just let auto save run my life but I lost 2-3 hours of game play cause I had to go back to previous save. It involved me buying new freighter and not getting all the stuff I had built.
You can buy one exosuit upgrade at each space station, when you buy them you can pick where to put them too. There are 3 different pages, general, tech and cargo. Cargo spots can carry 500 per resource vs the general 250.
Once you get freighter, get command console and than start sending out fleet to et more rewards from your ships doing missions on their own. This is another way to get extra rewards from not doing much yourself. Be mindful of difficulty level, I've been sticking with one star mission and still have gotten damage. When you go to fix damage on freighter be careful about falling off. I went jumping around first time and died in space.