Best advice I can think of for someone starting up, is don't become too dependent on JUST d/l'd brushes for backgrounds. You can't control the way they flow, plus they technically weren't even made by you ;p In addition, always try to make the lighting on the render used match the lighting from the background - Like in your example, the light source on the gun should be coming from a little above and left of it. I like using just a big round default brush to create the main light source/focal point, on a layer over the render. Don't be afraid to do some default brushing or whatnot on a layer OVER the render layer, it generally helps with the blending tons. Uh.. Might want to work with a slightly smaller size, although it really depends on preference. Smaller size means there's going to be less empty boring space. Also, more simple text generally works better, don't want to go crazy on the effects, gives it too much of an amateuristic feel
under chuck norrises bed. yea, even hes scared of me
using a lot of brushes isnt necasserily good they just blur each otehr out and fade... anyway nice start but there is a tip and its called blending. the render is way too jagged, as is the text. match colours, erase parts of stuff in, fade it. make it match. and COLOUR THE BG
This is a nice try man. Next time try to fade ou I don't know how to say this i'm sorry but like more incorporate you text \render in the background. Maybe staying in the same colors range help to make it nice to the eyes.