Start by getting yourself opened up to perceive the spirit on a more intimate level.
Get do know and understand some history and lore about the spirit if there is any. Then if there are any correspondences to the spirit you are aware of memorize what they are.
Then if there is a sigil, symbol, or fetish, figure, or idol or whatever you have that represents the spirit or spirit name memorize it.
Then when you are ready, begin your first evokation of the spirit. When you have made sufficient contact with the spirit and have had some time to converse with the spirit achieved whatever goal or answered whatever question end your ritual with gratitude to the spirit.
Then rinse and repeat.
Then do it again until you run out of shampoo and must purchase another bottle. 
After you have had several experiences with the spirit the next step is invokation. This is where you call the spirit into you for what’s known as controlled possession. This is where you become one with the spirit temporarily and when it’s over you take on the attributes of the spirit as well as some personality traits. Kind of like Rogue from the X-men but with a spirit instead of a mutant.
After that and assuming you have spent a decent amount of time without spirit in the astral or just in casual conversation I would say one would be well bonded with that spirit. Hope this helps, Cheers!