I'd summon a butler who has hypercompetence, meta teaching and meta ability creation. Sorta like a power butler but excels in many skills to assist me. Then I would ask for alpha physiology, enhance ability learning, absolute psionic and intelligence. After he gives me the powers he can teach me or my family in matters of education, or new powers and so on. Then for kicks I'd summon a sentient dungeon that has time dialation but will not allow me to age within that dungeon people are given a game like system and you fight,train,kill monsters and so on to your heart content. Once you leave the dungeon the system stays with the dungeon but you leave stronger and with new skills, ability, money if that what people want. Then Id summon all the gods in every realm (americas, norse, greek, african etc from gow universe and have them fight in the tournament of the gods the loser has to give me their domain, powers and abilities making the loser god mortal the winner of the tournament can return home. If i get bored then i will travel the various worlds by summoning a portal that will send me where i want to go. I feel like the meta summoning ability has unlimited potential so it up to your imagination.