Depth stop
The depth stop is a useful accessory when drilling. You can set it to exactly the depth you want to drill. That way, the hole will only be as deep as the job requires. This is especially important when you drill into thin materials, but do not want the hole to go completely through. The Bosch impact drills have a depth stop as standard equipment. You can purchase replacements at Bosch retailers or building supply centres. 

Drilling angle controller
When drilling, it is sometimes difficult to drill exactly perpendicular to the wall. To be safe, use a drilling angle controller. For example, you can place this device directly onto the work piece and then easily drill a hole that is exactly vertical. But if you would like to drill at an angle, you will do this with equal precision. You can adjust the controller to drill at an angle as narrow as 15 degrees. You can source a drilling angle controller for your Bosch impact drill through any Bosch retailer. 

Drill Stand
Impact drills can be clamped into a drill stand, which itself can be attached securely to the workbench. When using a drill stand, you can drill precisely into the work piece because the drill cannot slide. 
In addition, the drill stand allows you to precisely control the depth of the holes you drill because the drill stand has an integrated depth stop. You can find a drill stand for your Bosch impact drill at any good power tool retailer.

Drill bit types
The most common drill bits are called twist drill bits because of their appearance. It is important to distinguish between HSS (High-Speed Steel) drill bits and masonry drill bits. Type S (soft) HSS drill bits are used for soft materials like wood, plastic, and aluminium; steel and other hard materials are drilled with type N (normal) or type H (hard) HSS drill bits. Masonry drill bits have TC (Tungsten Carbide) tips and are used for impact drilling. 
There are many other types of drill bits that are designed for specialised tasks. Core cutters or hole saws are used to drill large holes with a diameter of 25 mm or greater. Countersink bits automatically create recesses for countersunk screws. Tile bits are used for drilling in smooth and brittle materials. You can find the drill bit that is right for your application at any good power tool retailer.