I want to max our my 401k this year. I was contributing 13% and I just increased it to 16%. I'm having a better than expected year so far. Compared to last year at this time, I've doubled my income. I need to watch this carefully but I want to put $18,000 in my 401k this year. I also get a 5% match from my company but I must be contributing at least 5% to get that so I can't max it out early. It won't hurt to bump down my contributions to 5% later if I'm close to the limit.
I don't want to work forever and I'm thankful that I can do this now because my circumstances might change later. You just never know.