Background (4mins)

Spot Healing Brush

New Blank Layer
Sample All Layers On

Clone Stamp Tool

New blank layer
Hardness 0
Opacity 75% ish
Aligned
Sample all layers

Content Aware Fill

Duplicate Layer (or MERGE TO TOP)
Use selection tool to choose area (lasso tool) to clean up
Edit > Fill > Content Aware
Repeat if not good enough
Use multiple selections to speed up process (shift key)

Content Aware Crop

Select Crop Tool
Turn off delete cropped pixels
Turn on Content Aware Fill
Drag crop area outside of frame
Apply
Only do small amounts at a time

Paint in Solid Colour

Select object to protect using select & mask output to selection
Invert selection
Create new blank layer
Eye drop colour to paint
Brush tool paint over background
Use clipped adjustment layer to amend background colour

Colour & Brightness

Use adjustment layers
Inverted mask
Paint in with white brush with reduced opacity

Patch Tool

Duplicate background layer
Select problem area with patch tool
Normal
Diffusion (low = defined edge, high = soft edge) high
Repeat to smooth