old sporty footpegs are longer than average. Solo lifting of a bike w/o luggage or with just soft bags is more challenging. Its about what you want to carry with you and why you are riding places solo off pavement. Consider not doing that. Self recovery is good, but at some point you're too far out and it can be a long time before anyone else comes along. Have a plan for when you can't self recover.
W/o any supporting terrain, (trees, boulders, fence post, etc.), it's a challenge to find leverage. Especially if you're lighter yourself. A couple of long ratchet straps go a long way in getting the bike up if you have a place to tie one off to. W/o that or other items to prop the bike up as you progressively raise it, the motorcycle hoist is going to be a necessary tool in your kit.
If the bike is seat down hill, grab the bar and turn it around, spinning it on the ground until the seat is uphill. Scratches be damned, you're by yourself, just get it done. The on your knees method shown in Desoto's link is a real pain on a bike flat to the ground, but it works. Thankfully most of us ride in pants with knee armor! Remember you are not lifting, you're pushing. With the bike flat, there is some initial lift necessary to get the tire(s) on the ground, but then just push and it comes up. This is not fun in soft terrain. The bike wants to slide instead of come up. Try to wedge something so the wheels don't slide, or dig a little out so the wheels go into the rut you created and stop sliding. Do this before you burn a bunch of energy trying to lift or push the bike up.
With the scenario you describe, I'm not sure the handle will help much. It's going to be down in the dirt and hard to get to. Short of carrying some form of collapsing leverage device with you and having a place to put it into the downed bike, I'm not sure what else to offer.
