If you are gluing a replacement tip to a pen or pencil, for example, you may need to clean the end of the pen or pencil where the tip will be attached, and roughen the surface slightly to help the glue adhere better. Additionally, you should make sure that the replacement tip fits snugly onto the end of the pen or pencil, and use a small amount of glue to attach it.
If you're using a super glue, you should use a small amount, enough to coat the surface area, and make sure to not put too much to avoid squeeze out, put the parts together immediately and hold firmly for a couple of seconds or until the glue cures. Avoid contact with skin as it will dry out and become brittle.
On the other hand, if you are gluing a tip to a wooden object, such as a cane or a walking stick, you will likely need to do some sanding or carving to create a snug fit for the tip, and use a wood glue that is designed to bond wood to wood.
It will be helpful if you can give more context on the tip you want to glue and the object it will be attached to, along with the type of glue you will be using.