[@Hipster] I suggest try training yourself to post. I know it may seem odd but even hobbies need a certain level of devotion. When you join or create and rp you're basically telling those in the Rp that you respect the time they put into it, so you need to try.

I know with life in general posting cam get hectic and motivation isn't always there. For me, this is why I try to have built song play lists for various scenarios - introductions, fights, romance, etc. And I try to chose a theme song I can fall back on for each character. Music helps get me in the mood to rp.

If the rp is based off a movie, tv show or anime I'll try to have that on the tv or computer as I type, again, all about the ambiance here.

If you do need drop an rp for any reason, always let your fellow rpers know. It is a far forgotten common courtesy that needs to be reinstilled into the RP world. 

I know as a Gm if someone lets me know they need to drop I'll leave a space open for them in the future. If they just stop posting but I see them active elsewhere on the forum I won't allow them into any future rps of mine. 

Communication is key when it comes to rp and will many times get you much further than any post count. 

Again, find what you love, rp that, set aside time for it. We make sure each day we have time for work, studies, bathing, eating and so forth. Just do the same for rp, if you find it hard to post, find inspiration. Sometimes you will just have to force a post and while it is generally frowned on, I would rather force a post to get back in the swing of things than drop an rp fully.