Make garlic or other flavored oil yourself
Probably not the top tip now, because everyone could come up by themselves, but still I publish it:
Every now and then I cut a whole tuber of garlic into lots of small pieces, place them in a sealable glass (for me it's an empty Sambal Oelek glass) and pour normal oil over them. Sunflower or vegetable oil is best. Then in the fridge. Stops forever, the oil is great for searing and finely chopped garlic you always have there.
Goes also with other things, lately I tried it with a paprika. The oil has a fantastic paprika cloth and the food tastes much more aromatic.
