Due to too much to go into, I turned half my garage into my gym. Just me and my 4 yo daughter kicking it. (She has her pink one lb weights she "presses")
I crank up tunes, Dubstep, rap, metal, whatev is fierce and that gets me going. Plus a good preworkout drink can get you cranked too. Rocking some Mesomorph currently.
I watch the motivational vids too and have posters on the walls. Plitt (RIP) does have good ones. Just keep that stuff running thru your head.
The key is to hit it even when you don't feel like it, tired, whatever. Just remind yourself, this is who I am, this is what I do.
And of course there's always the little chickie at work, store, wherever that asks "hey do you work out?" and "can you give me advice?"...the chest puffs out a little more then and you're Austin Powers "yeah baby!". Instant motivation.