It would depend on what routine your doing while your jelqing. If your doing a girth routine I would do [words=http://www.mattersofsize.com/forum/penis-enlargement-forum/12539-slow-squash-jelq-nothing-give-me-better-expansion.html]
SSJ[/words] or just intense girth jelqs and if your jelqing for length, I would do PC flexes before to tire my penis out from getting an erection or stop and do PC flexes until the erection subsides.