Sharper low-light images?

[~D~]

I have Nikon D60 and one of those little desk tripods. It's really not practical for me to carry a full tripod around with me all day nor to go home and come back with a tripod, so I tend to balance the small tripod on bridges (being very careful of course!) and take photos.

However I find that the action of the mirror flipping up in the SLR makes my images soft in low-light, and since the D60 doesn't have a mirror lockup function (for photographic purposes). I was wondering if there were any tips I could use to get sharper shots with the little tripod?

 

[~D~]

Thanks for your replies.

Sorry I didn't mention but yes, I am using an IR remote.

At the moment I'm primarily using my 35mm f/1.8 lens, which doesn't have VR and usually within the 1/20-1 second area - which D.P says is worse for mirror slap.

I'll give a gorilla pod a try, it says it can support up to 3kg and the legs are made of individual sections which apparently help to absorb shock (additionally it'll also be useful for other aspects of my photography too), but if that doesn't work I'll try a beanbag