1 -Don't stand right in front of your amp. Unless you have an 810 or some other setup that puts speakers aound chest high you're basically blasting your calves with bass. Since you don't have ears behind your knees you aren't hearing anything. Move forward
from your amp 4 - 6' so some sound actually hits you at ear level.
2 - (Actually sort of a variation on 1) If you don't have the space to get out in front of your amp a few feet, tilt the cabinet up. If it has casters, take the back 2 off. If it doesn't, put a scrap or 2 of 2x4 under the front edge to tilt it up towards your face.
3 - (Actually a variation on 2) Get a kickback combo so you don't have to carry 2x4 scraps with you to a gig.
4 - I built a 3' x 6' platform out of 3/4" plywood and 2x4's laid flat. I put my amp/cab on 1 end and I stand on the the other. Works great when we rehearse in the basement on a concrete floor.
5 - (A variation on 4) Get one of these:
http://www.thebuttkicker.com/musicia...ts/bkp_kit.htm
I played with this at a trade show and it's why I built my platform for rehearsal.