Prepare a clear, uncluttered workspace. In addition to room needed for tools and handling the circuit board, allow space for some kind of "parts organizer" that will not be bumped or dropped. This organizer can be a small tray or box. (An egg crate works great!) Refer to the Parts List published in the kit manual. Organize the kit parts according to basic types. 

Check carefully to make sure a small part did not slip away when opening the kit's packaging. Please make sure that you have sufficient lighting for clear parts identification and accurate circuit soldering. This might seem like gratuitous advice that you did not ask for, but experience has shown that brown, orange, red and silver resistor colors and tiny numbers on capacitors and transistors all start to look the same in dim light after a hard day's work! 

Some PC-boards are very tiny with tight parts layouts. Take a little time to read through the instruction manual for your kit before you start assembly.