How to get rid of mosquitos at the front door

Not sure how well it works (haven't had a chance to use them, yet) but the Off Clip-on Mosquito Repellent seems quite convenient. You can clip them on and keep mosquitoes away while you work in the yard, this way you can't mistakenly wonder out of the protected range of candles, and you don't have to spray chemicals on your skin (that wear off as you sweat anyway).

WebMD says

"Mosquito traps, a relatively new product, may be the answer. They work by emitting substances that biting mosquitoes find attractive -- such as carbon dioxide, heat, moisture, and other mosquito-friendly byproducts. They attract, then trap or kill female mosquitoes. When placed strategically near breeding spots, "they have knocked [mosquito] populations down,""

Placing one of these Mega-Catch™ Alpha Mosquito Traps a little way from your deck or patio, should lure the mosquitoes away from you and into the trap.

That's a silverfish. They're harmless to people and they won't do any structural damage to your home, but they do like to eat starch, cellulose, carbs; they'll do damage to wallpaper, book bindings, clothing, that kind of stuff. They like to eat mold and fungi too, and they tend to live in dark, moist / damp places.

As with any pest if you search around on the internet you can find a zillion suggestions for getting rid of them, some more successful than others.

Large infestations usually require an exterminator (if you find them problematic). But for small ones there are various things you can try first. This article on WikiHow has a number of suggestions, too many to reproduce here. Here is another decent article, although it's fairly clear that the author really despises these bugs.