.Blend size help!!!!Help needed

Hi,
i am not sure if this is the right forum,but i have a important question.I recently created a scene but when i looked at the size of .blend it was 84mb, this is too much ,i have seen scenes more complex than mine on this site but i don’t think they consume so much memory.Can you tell how do i reduce the size of blend file to somewhere reasonable
Also i got a another a question when i upload my jpg/png files on this site they are around 1.5/2 mb but i have seen other peoples work that are around 400/500kb.i tried to size through Microsoft picture manager but it reduces its quality can you tell me how to do it without affecting quality

Moved from “General Forums > Blender and CG Discussions” to “Support > Technical Support”

Can you tell how do i reduce the size of blend file to somewhere reasonable
remove the things you don’t need, meshes, particle system, textures etc
Reduce size of any textures
When you save your blend file, enable the ‘Compress’ option in the blender file browser