So pretty much as the tittle says, I’m wondering if anyone has any tips about how to summon things in a dream. I’ve tried almost everything I can find on the forum, willing it to happen, yelling for it to happen, pretending it will appear when I go around a corner or a door or something. I’m getting near 10 LD and I’ve noticed that I spend alot of time in my LD trying to summon things and I was wondering if anyone has had the same problem and has some advice or tips on this.
47 LD’s here and also not good at that either. I’ve never spend much time on it, though. I have good control over objects and forces that are present in my dreams, but changing complete dream scenes hasn’t work yet.
Well, it’s up to your determination to summon an object. You must really believe it. Maybe you’re narrow-minded, and it’s hard for you to imagine a miracle happening. If you have any doubts, the object will not appear, you must be pretty confident for it to work.
As Yoda from Star Wars said: “Do or do not, there is no try.” 
Also you may want to look at some topics on how to enhance your dream control, if you haven’t done that already. If you still fail to do something, convince yourself that this is a dream, and you’re the lord. Do a few RC to power on you conscious mind. Concentrate and summon the object. Again, believe in your powers, or you will fail to summon it.
To create something , I 've found, that it’s like a strong desire coming from deep inside that becomes part of the dream. In a dream I was walking though a meadow and it started getting dark and and I thought , it would be nice if it got light again, and suddenly a beautiful sunrise appeared.
Sometimes I use doors that open with the creature behind it, only darkness is on the other side of that door. It always worked when I tried, problem happened when I couldnt send it back hehe.
Had to wake myself up to prevent myself from being eaten by zombies in a lucid dream. Those bites tend to hurt alot!