Thrips are potentially easy to find because they are everywhere, they are absolutely minute so you need to look very closely to see them, and make sure you know what they look like ahead of time... If you know somebody who has a garden, look on the leaves of the vegetables to find them.

Springtails are also incredibly minute, you can find them in soil (grab some soil. place it in a pan, and if you see microscopic things crawling from it it's probably springtails.

Silverfish and firebrats like to hide in dark places in buildings. Garages are a good place to look for them: look under pices of woods and other things on the floor, they will crawn away when exposed to light, you can catch them then.

Damselflies can easily be found flying around ponds... during the summer.

The other species are harder to find. You can indeed attract caddishflies adult with a light trap at night. Bristletails can be found hiding under debris in forested areas (if you are very lucky). For the other species, unless you know a dog infested with fleas or know of a termite colony close to where you live, you will have to forget about them.

Silverfish Bug: One has to be very careful while treating the silverfish bug as it can cause harm in the areas where they grow. We might not be able to see them at all times but they can be traced by their mold which they shed often during their multiplication. They should be treated as soon as they are traced as they can cause tremendous loss and damage to our belongings. They can dig holes in the wall, pierce through our clothes leaving a yellowish stain on it, and destroy book bindings. They can also scrap the plaster of the wall and make ugly looking holes in it.

The silverfish bug can be also traced in the outside environment like bird nest, on the body of animals and on the bark of the wood. These are the places from where they generally cultivate and then gradually enter into our house. Some common measures which one can adopt to treat them are by keeping the surroundings free from stagnant water and by keeping the bathroom clean and dry. Regular spraying of insecticides is also essential to get rid of them. One can get rid of them inside the cupboard by keeping naphthalene balls. Silverfish bug is a very common insect seen in the household. As it generally breeds in moist areas one should try to keep the areas dry and clean.