How to position a bike for work without a stand I want to tweak my gears, from time to time: Adjust my front and rear derailleur limits, see if the shifts are smooth, make small adjustments on the cable tension, and so on. 

Is there any way to get the bike in position without help of anyone?

I don't want to spend money on a bike stand.
In my experience, most light work can be done with the bike stored upside down (standing on the handlebars and seat). Of course, I'm assuming that you're talking about a road bike. Other bikes, like a mountainbike with a twist-shifters or trigger-shifting, might not be as well suited.