I have been doing spirit summoning for a while and have summoned everyday spirits and demons. But how does one go about summoning an angel. I'm told it can be done, but i do not have any information to go on. If you guys could help me out that would be great.
Its no different to any other evocation. Of course you could come up with specific rituals for each angel, but that's up to you.
Since you're experienced in evocation and/or invocation, I reckon youll manage.
Personally I would spend a day or so studying the different hierarchies and angels to get a feel for the different spheres of influences they are responsible for. That way you can be specific in your calling for an angel reflective of the situation you are calling for help on.
The different angels have individual archetypes, personalities, and spheres of influence they are responsible for. Actually there is a considerable amount of valid comparison between a group of angels, and a pantheon of gods under other faiths. Each has its role, and represents different acts, tasks, aspects of humanity, and levels of authority or influence.
As a quick example, Archangel Michael is commonly called on for protection, or for the use of his sword of truth that cuts through falsehood and illusion.