1. Pick your photo and crop it to where you like it
2. Duplicate your layer
3. Go Filter>Render>Lens Flare and choose the flare you lik
4. Position your lens flare and make it pretty bright
5. Click OK and the select your blending mode from the dropdown menu
6. Toodle with the opacity
7. Choose a Photo Filter to warm the photo up
8. Once there, you can choose a colour to work with.