Get Off Your Butt: 16 Ways to Get Motivated When You’re in a Slump

One Goal.
Find inspiration.
Get excited
Build anticipation.
Post your goal
Commit publicly
Think about it daily.
Get support
Realize that there’s an ebb and flow
Stick with it.
Start small. Really small
Build on small successes.
Read about it daily
Call for help when your motivation ebbs
Think about the benefits, not the difficulties
Squash negative thoughts; replace them with positive ones

Source: http://zenhabits.net/get-off-your-butt-16-ways-to-get-motivated-when-youre-in-a-slump/