Assuming you are an average sized dude:
1. Crank that prone bone. She face down, pillow under her hips, you grind from on top. Don't stroke, grind it like you are trying to get minerals.
2. Missionary with a pillow under her. Rather than stroking(again) swivel inside of her and see what areas in her walls get her going. Keep hitting the ones that get her going nuts, but do it slow.
3. Whatever you are doing, don't be mr. Backshots. If you hitting missionary, hold that girl like you both going down in the titanic and it is your last nut. Make her feel close to you.
Now, assuming she aint the type to wanna get hit right away, the key to a bomb orgasm for your girl is to get her so loose mentally that she drools. Foreplay slow. What I did with success a few times was take a full 30 or so minutes to kiss and rub everything. The trick?: NEVER touch her kitty kat. Your job is to get her turn on enough that everything becomes sensitive to touch. The nape of her neck, her earlobe, and my personal fave that women NEVER expected...the back of her knee. When you have her ass naked and moaning, flip her on her back and kiss the back of her knee. You will thank me later.
Remember, it isn't a race, breh.