More advice? How about more details?
But, since you asked...You'll need a high speed cable between each source component (BD player and Cable Box by your description) and your TV. So count the number of components (2) and that's the number of cables you'll need. The cables should say "High Speed" and certified somewhere in the advertising. Don't be afraid to ask for a high speed certificate if the advertising doesn't look right.
If your TV has enough HDMI inputs for the number of sources (it does) and you want to use your TV's speakers (don't know), then you're set. If either of those aren't true, then you'll need to get something to switch HDMI and/or a receiver with speakers for the audio.
Without more details, that's about all I can provide.